Bridging Biomes: Exploring The First Beringian Migrations

Image Credit: Painting by George Teichmann (https://www.beringia.com/exhibits/first-people) from the Yukon Department of Palaeontology Art Collection.

Introduction

Translocation has historically been one of the strategies employed by humans to seek subsistence and other resources. Changes in climate and the environment have been one of the major reasons for human migrations, even more dynamically so in hunting communities as prey animals can only adapt to these through movement. One such set of journeys occurred along the Bering coast, commencing as early as 37.5 thousand years ago.

Map 1: Geographical location of Beringia. Dark brown borders represent the extent of the present-day coastlines, while light brown borders indicate those during the Last Glacial Maximum (National Park Service, 2023).

The Bering Land Bridge intermittently connected Eurasia and the Americas across deep time, most recently at 38000 B.P. (before present), up until 10000 B.P. after which it would remain submerged to this day. It was during this period that our species colonised the New World (i.e. the American continents) after exiting Africa about 70 thousand years ago (hereafter kya), encountering various climates and environments. 

Temporal Correlations: Comparing dates using evidence

The discovery of more than 1900 stone artefacts found in the Chiquihuite cave in Mexico, some of which date to 33 kya has made it the earliest, although contested sign of humans in the Americas to date. If humans reached central Mexico 33 kya, when did they enter Beringia?

Genetic evidence says that proto “Beringians” split away from East Asians as early as 37.5 kya, soon after the formation of the bridge. It was from this ancestral population that groups would make incursions into Beringia, whose descendants would become the Native Americans. These people seem to have wasted little time in recognising and making the most of this newly accessible resource-rich space, most probably by following other fauna. 

Mobility and Subsistence Economy: Exploring Interrelationality

Regardless of the exact time of arrival of Beringians into the cold, harsh, and seemingly barren land, why would any sane individual, let alone entire communities undertake this journey to the unknown? 

For starters, these migrations happened over the course of thousands of years. Even by the most conservative estimates, a thousand years is more than 30 generations. On average, each generation would have travelled perhaps a hundred kilometres over the course of their life. Also, prehistoric humans had no knowledge of or ambition to colonise huge, unexplored continents, nor could they distinguish between the Old and New Worlds. These “migrations” were simply a consequence of their itinerant lifestyles. 

Why move at all? Nomadic life to varying degrees had been the norm for the last 6 million years of our evolution. Aside from the mobile nature of our subsistence throughout the Paleolithic, a few other “push” and “pull” factors possibly influenced their decision. Perhaps the biggest push factor was the presence of other human groups in more known territories that threatened their existence. Despite population densities being much lower than present-day, the vast territorial ranges of nomadic people made competition for resources and the necessity for newer lands significant. Moreover, although temperatures were around the same as today, Northeast Eurasia wasn’t much warmer than Beringia. 

Some researchers also believe that the presence of naive fauna, i.e. animal groups that had never before encountered humans and were therefore largely ignorant of their potential threat, enticed these individuals to unexplored territories. As is always in science and even more so in prehistory, this is debated. However, the navieté of certain wild animals in fringe areas is not unknown. Even today, penguins at the south pole are nonchalant and even curious in the presence of humans.

Floral and faunal analysis suggests the impossibility of southward movement across present-day Canada through the passage between the Cordilleran and Laurentide ice sheets until 12,600 years ago. Therefore, while other overland corridors might have been used for the colonisation of the rest of the Americas, this opens up the possibility of a coastal movement. Such travel might have occurred along the southern coast of the Bering Land Bridge, especially with the potential presence of resource-rich kelp forests. Kelp, along with the biodiversity that it supports, inhabits parts of the present-day coastline and likely did so before the Last Glacial Maximum as well, based on paleotopographic reconstructions. 

Map 2: Earliest possible reconstruction of Beringia at 30,000 B.P. (Dobson et al., 2021). Potential kelp habitat is shown in red at depths of 3-20 m. The legend on the right indicates the elevation/depth corresponding to other colours of different regions

Kelp forests host a variety of fish, shellfish, birds, and mammals such as seals and walruses. These could have formed a large enough part of the economy of coastal people such that they were capable of and willing to move about this zone even in the absence of a major impetus. Coasts are also often generally characterised by moderate temperatures in comparison to interior regions and were likely preferred, especially in high latitudes. Therefore, the potential for coastal migration along the Northern Pacific is great. As with any coastal remains, underwater archaeology is required to locate concrete evidence of occupation of now-submerged paleo-islands and coastlines. 

Mobilities as a Resource: Translating it to Movement 

An Inuit man kayaks to shore. (Library of Congress)

While the gradual spillover of the Northeast Asian tribe complex across Beringia and into the Americas is an extension of the Out-of-Africa dispersal, this process is ultimately an outcome of seasonal variations in temperatures. Nomadism is often not random, but a semi-cyclic movement largely dictated by herd movements and, ultimately, seasonal changes. Present-day Walrus populations also migrate southwards towards the warmer Bering Sea during the winters and largely remain in the regions of pack ice during the summers. Keeping in mind the dangers of over-relying on ethnographic evidence to infer prehistoric life, the contribution of such faunal movement to the peopling of Beringia was likely immense, as pinnipeds constitute a major part of the present-day Inuit diet. 

Up until a few decades ago, Inuit tribes such as the Nunamiut of Alaska heavily relied on Caribou, residing inland throughout most of the year. However, they travelled to the coasts in the summers where they hunted marine mammals and traded extremely sought-out Caribou products such as fur and sinew with the more coastally oriented human groups. In contrast, North Alaskan Inuit groups specialised in Baleen whale hunting. Such differences in economies of human groups likely also existed in prehistory, as they colonised Beringia.

Therefore, it is possible that the accumulation of a surplus of local resources and the resulting seasonal movements to exchange them incrementally shifted the locus of this semi-cyclic movement over hundreds or thousands of years. Mobilities were necessitated by the seasonally changing easiest acquirable food sources, as well as the regular need for clothing and tools. These also provided avenues for interaction between tribes, opportunities for genetic and cultural exchange, and the maintenance of population numbers, which was necessary to sustain newly established colonies. 

Adaptations are by themselves both material and cultural processes that require knowledge transmission over generations.  Generations of people had to continually practise a nomadic way of life for such oral traditions relating to mobile survival skills to have remained relevant. Each generation needed to learn the strategies used by the former and appropriate them to their own contexts and ecological niches that they preferred. The resource of mobility, therefore, was inherited and needed to be used by every generation intermittently throughout their lives so as to transmit updated information on adaptive strategies. 

This could be seen in pre-modern, and to a certain extent, modern Inuit communities in what is termed Traditional Ecological Knowledge (TEK). Generations of Inuit, and possibly Beringians learnt details of herd movement, interception techniques, local landscapes, other human groups, spiritual beliefs, and weather patterns, as well as the creation and use of tools, boats, and shelters through the ancestral social memory and applied their own experiential knowledge, thereby enabling strategies that were flexible over various contexts. The capacity to colonise new territories and survive unprecedented challenges is an important precondition for the movement itself. 

This was developed through the presence of such an established yet dynamic system of knowledge as TEK.  For example, when these people reached the Great Plains in the south, they would have encountered vastly different ecologies containing mostly open savannahs with occasional swamps and thick forests. Each generation had to adapt considerably and consistently across the lands that they traversed, to eventually enable the hunting of a variety of megafaunas such as mammoths, horses, deer, sloths, and bison encountered in the plains. To do so, each generation had to consult the TEK that they were passed down, either apply it readily if their contexts were sufficiently similar or use it in conjunction with their experiences to work out strategies appropriate to their present contexts. If successful, these strategies would be included in the TEK that would be inherited by the next generations.  The formation of networks that were used on a semi-regular basis, such as the Nunamiut’s seasonal trade migrations, was afforded by inter-tribal TEK that were exchanged during crossings. 

Conclusions

Mobilities have directly influenced the outcomes of every event and process in history through their role in developing networks. As Martin Bell concedes, the frameworks of networks in the present were laid thousands of years ago. Apart from being corridors of traversal, these routeways and intersections came to be imbibed with meaning, becoming ‘sites’ of exchange. The mobility of knowledge increased through inter-group interactions. Communities with flexible but deep traditions often specific to their contexts could learn from each other, enabling them to survive in the others’ unique environment. Thus, mobilities were self-multiplying, self-retarding phenomena, inducing change throughout history, catalysed by varying environments, and accompanied by bio-cultural exchanges of genes, commodities, pathogens, or associated ideas, moulding human populations and their behaviours.

The uniqueness of the Beringian and American migrations lay in the ability of humans to inhabit a range of ecologies in a relatively short span. The Beringia mobilities were some of the earliest and most consequential adaptations in the history of modern humans as they contributed to some of the most rapid mass extinction events, allowed for the eventual cultivation and spread of crops previously unknown to the Old World, and the relatively isolated development of mighty empires, unique cultures, languages, and ways of life. 

A strictly linear movement into such a vast space is impossible. For the sustained colonisation of Beringia and subsequently, the Americas, networks of groups suited to various ecologies were necessary. These networks would in turn provide the bases for those in the future among Native Americans, facilitating the movement of important ideas such as those of food production. Late mediaeval Europe and Asia benefited from the Columbian exchange only because Native Americans had developed useful commodities with the help of intricate networks. The migration of humans into Beringia from Northern Eurasia was the beginning of American human history, which continues to impact our lives today and hence deserves attention.

An Afterthought

It is fascinating to ponder on the origins of TEKs, and whether they predate our species. It is obvious that some form of cultural learning can be inferred from the earliest stone tools dating 3.3 million years ago. Some other aspects, such as learning hunting strategies from the progenitors are shared with other animals. However, humans today largely rely on observation skills rather than primary senses to infer weather patterns and plan ambushes of migratory herds. These, along with more complicated aspects of resource use, abstract ideas, and spiritual beliefs could only be transmitted through significantly sophisticated spoken languages. At what points in our evolutionary histories did we start exhibiting such behaviours, and why?

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Why Science Communication Matters: The Case of Human Origins

Science communication is the process of sharing scientific knowledge and discoveries with diverse audiences using various methods and media. Science communication can have many goals, such as informing, educating, inspiring, or engaging people with science. Science communication can also foster critical thinking, evidence-based reasoning, and curiosity about the natural world.

One of the most fascinating and controversial topics in science communication is human origins. Human origins are the study of how our species, Homo sapiens, evolved from earlier forms of hominins (human-like primates) over millions of years. Human origins encompass various disciplines, such as paleontology, archaeology, genetics, anthropology (paleoanthropology, that’s us!), and linguistics. Human origins also touch upon fundamental questions about our identity, diversity, culture, and morality.

Why is science communication surrounding human origins important? There are at least three reasons:

– First, science communication surrounding human origins can help us understand ourselves better. By learning about our evolutionary history, we can gain insights into our biological traits, behavioral patterns, cognitive abilities, and cultural diversity. We can also appreciate our connection with other living beings and our dependence on the environment. Science communication surrounding human origins can also challenge some common misconceptions or stereotypes about human nature, such as racial superiority, gender roles, or innate aggression. Understanding these issues from a scientific point of view explains that there are no such things are binary genders, biological races, etc. Understanding this can lead to a much more unified and peaceful future once we understand that there are so many more things that unite us than that which makes us different. 

– Second, science communication surrounding human origins can help us prepare for our future. By studying how our ancestors adapted to changing climates, habitats, and resources, we can learn valuable lessons for coping with current and future challenges. We can also recognize the potential and limitations of our species and the ethical implications of our actions. Science communication surrounding human origins can also inspire us to explore new frontiers of knowledge and innovation. We live in an ever-changing world in which climate science tells us it is going for a negative turn. We are headed towards a world in which we are going to have to adapt to survive, perhaps not physically, but in the ways in which we do things. Understanding how we had done this before, as we navigated the world as we spread outside of Africa, can lead to understanding how we need to adapt to new ecological niches. 

– Third, science communication surrounding human origins can promote dialogue and respect among different perspectives. Human origin is a topic that often sparks curiosity and interest among people from various backgrounds and beliefs. However, it can also generate controversy and conflict, especially when it conflicts with religious or ideological views. Science communication surrounding human origins can facilitate respectful and constructive conversations among diverse groups by providing accurate and accessible information, acknowledging uncertainties and gaps in knowledge, and inviting feedback and questions. It is always important to remember that while you may find people with conflicting beliefs, there is a good chance you can find common ground with them on something else, and use that as a starting point for further understanding. Human origins should not be forced upon anyone, as any respectable anthropologist with an understanding of different religious and cultural backgrounds, and respect them and their practitioners for who they are. 

Science communication surrounding human origins is not easy or straightforward. It requires careful consideration of the content, context, audience, and purpose of the message. It also requires sensitivity to the topic’s cultural, ethical, and emotional aspects. However, science communication surrounding human origins is essential and rewarding. It can enrich our understanding of ourselves and others, enhance our appreciation of science and nature, and foster a culture of curiosity and dialogue.

Sources:

– Science and Human Origins | Discovery Institute

– Human Evolution Evidence | The Smithsonian Institution’s Human Origins Program

– 10 Facts About Human Communication

– Human Communication – an overview | ScienceDirect Topics

– Origins of Human Communication – Michael Tomasello

The Paleoanthropology of the Future of the Universe

Co-Authored with the New Bing

Paleoanthropology is the branch of anthropology that studies the origins and evolution of early humans and their relatives. ¹ It uses fossils, artifacts, and DNA to reconstruct the biological and cultural history of our species and its ancestors. Paleoanthropology can help us understand where we came from, how we adapted to different environments, and what makes us unique among living creatures.

But can paleoanthropology also help us understand where we are going, how we can cope with future challenges, and what role we have in the cosmos? In this blog post, I will explore some of the implications of paleoanthropological research for the future of the universe. I will discuss how our knowledge of our early ancestors can inspire us to explore new frontiers, to appreciate our diversity and commonality, and to protect our planet and its resources.

Exploration

One of the most remarkable features of human evolution is our ability to expand our geographic range and colonize new habitats. From our origins in Africa, we spread across the globe, reaching every continent except Antarctica. We adapted to different climates, landscapes, and ecosystems, using our intelligence, creativity, and technology. We also encountered and interacted with other hominin species, such as Neanderthals and Denisovans, exchanging genes and culture. ²

Our curiosity and wanderlust have not diminished in modern times. We have explored the oceans, the poles, the mountains, and even outer space. We have sent probes and rovers to other planets and moons, searching for signs of life and potential resources. We have detected thousands of exoplanets orbiting distant stars, some of which may be habitable. We have dreamed of colonizing Mars or other worlds, or even building artificial habitats in space.

Paleoanthropology can inform and inspire our future exploration of the universe. It can teach us about the challenges and opportunities of living in different environments, the benefits and risks of encountering other life forms, and the ethical and social implications of expanding our presence beyond Earth. It can also remind us of our humble origins and our connection to nature.

Diversity

Another remarkable feature of human evolution is our diversity. We are a single species with many variations in appearance, behavior, culture, language, and genetics. We have evolved different adaptations to different environments, such as skin color, body shape, lactose tolerance, and altitude tolerance. We have developed different ways of life, such as hunting-gathering, farming, herding, fishing, and industrialization. We have created different forms of art, music, religion, politics, and science.

Our diversity is a source of richness and beauty, but also of conflict and misunderstanding. We have often discriminated against or oppressed people who are different from us based on race, ethnicity, gender, religion, or ideology. We have fought wars over resources, territory, or beliefs. We have exploited or endangered other species or ecosystems for our own benefit.

Paleoanthropology can help us appreciate and celebrate our diversity while also recognizing our commonality. It can show us that we are all part of one human family that shares a common ancestry and a common destiny. It can also show us that we are not alone in the universe: we are part of a larger community of living beings that share a common origin and a common home.

Protection

A final remarkable feature of human evolution is our impact on the environment. We are the only species that has altered the planet on a global scale through our activities. We have modified landscapes through agriculture, urbanization, mining, and deforestation. We have emitted greenhouse gases that cause climate change and affect weather patterns, sea levels, and biodiversity. We have polluted the air, water, and soil with chemicals and waste. We have overexploited natural resources such as water, land, minerals, and energy. We have driven many species to extinction or endangerment through hunting, fishing, poaching, and habitat loss. ³

Our impact on the environment has serious consequences for our own health and well-being. We face threats such as food insecurity, water scarcity, natural disasters, infectious diseases, and social conflicts. We also risk losing the benefits that nature provides us, such as clean air and water, fertile soil, pollination, pest control, recreation, and cultural values. We need to find ways to reduce our ecological footprint and live more sustainably.

Paleoanthropology can help us protect the environment by showing us how our ancestors lived in harmony with nature for millions of years. It can also show us how our ancestors adapted to environmental changes and challenges in the past. It can provide us with insights and lessons on how to cope with current and future environmental issues. It can also motivate us to preserve our natural heritage and respect our fellow creatures.

Conclusion

Paleoanthropology is not only a fascinating field of study that reveals our past but also a relevant and useful field that informs our present and shapes our future. By learning about our early ancestors and their evolution, we can gain a better understanding of ourselves and our place in the universe. We can also find inspiration and guidance on how to explore new frontiers, appreciate our diversity and commonality, and protect our planet and its resources.

Paleoanthropology is the study of the past that illuminates the future.

Source: Conversation with Bing, 4/5/2023

(1) Human impact on the environment – Wikipedia. https://en.wikipedia.org/wiki/Human_impact_on_the_environment.

(2) Human Impacts on the Environment – National Geographic Society. https://www.nationalgeographic.org/topics/resource-library-human-impacts-environment/.

(3) Here’s 11 ways humans impact the environment on Earth. https://interestingengineering.com/science/11-ways-humans-impact-the-environment.

(4) Human Impact on the Environment – tutorialspoint.com. https://www.tutorialspoint.com/human-impact-on-the-environment.

(5) . https://bing.com/search?q=Paleoanthropology.

(6) Paleoanthropology – Wikipedia. https://en.wikipedia.org/wiki/Paleoanthropology.

(7) Paleoanthropology | Britannica. https://www.britannica.com/science/paleoanthropology.

(8) 1. Paleoanthropology – The History of Our Tribe: Hominini – Geneseo. https://milnepublishing.geneseo.edu/the-history-of-our-tribe-hominini/chapter/paleoanthropology/.

The Child from the Darkness of Rising Star – Skulls with Seth

The discovery of the Homo naledi child skull Leti

In November 2021, researchers announced the discovery of the first partial skull of a Homo naledi child, found in a remote and narrow passage of the Rising Star cave system in South Africa. The child, nicknamed Leti, was about 4 to 6 years old when he or she died, about 250,000 years ago. Leti belonged to an ancient human relative that shared some features with modern humans, such as a curved spine, but also had some primitive traits, such as long fingers and a flared pelvis.

The discovery of Leti has important implications for our understanding of human evolution and behavior. It suggests that Homo naledi practiced some form of ritual burial, by placing their dead deep in the dark caves. It also reveals more about the growth and development of Homo naledi children, and how they compared to other human ancestors and modern humans.

One of the most striking features of Leti’s skull is its shape. It has a flat forehead, large eye sockets, and a prominent brow ridge. These are typical characteristics of early Homo species, such as Homo erectus and Homo habilis. However, Leti also has a relatively small face and teeth, which are more similar to those of later Homo species, such as Homo sapiens and Homo neanderthalensis. This suggests that Homo naledi had a mosaic of features that evolved at different rates and times.

Leti’s skull also shows signs of damage and erosion, which may indicate that it was exposed to water or scavengers before being buried by sediment. The researchers have not found any other bones of Leti or any other Homo naledi individuals in the same location. However, that is not saying much since the location is so absolutely hard to get to, that excavations are on going. This raises questions about how Leti’s skull ended up in such a difficult-to-reach place, and whether it was intentionally placed there by other members of her species.

The discovery of Leti adds to the growing evidence that human evolution was not a simple linear process, but a complex and diverse one. It also challenges our assumptions about what makes us human, and how we relate to our ancient relatives.

Where did we come From? Are Homo sapiens from one place?

Did you ever wonder where we came from? Where did Homo sapiens, the species that we belong to, originate? Is there a single place on Earth we can call our one true home, or did we evolve in different regions worldwide? Scientists have been trying to answer these questions for decades, using fossils, genetics, and other clues. In this blog post, I will explore some of the evidence and theories about the origin of Homo sapiens and what they can tell us about our past and ourselves.

One of the first things we need to know is when did Homo sapiens appear. According to the fossil record, our species evolved in Africa about 300,000 years ago from an earlier human ancestor, possibly Homo heidelbergensis or Homo rhodesiensis. Some argue that these two are the same species, but we will use a more established taxonomy to keep things less complicated. These early humans had larger brains and more complex tools than their predecessors, such as Homo erectus, who had migrated out of Africa about 1.8 million years ago. However, they were not yet fully modern in their anatomy or behavior.

The oldest fossils of fully modern Homo sapiens that have been found so far are from two sites in Ethiopia: Omo-Kibish and Herto. The Omo-Kibish fossils date back to about 230,000 years ago, and are considered to be the earliest known representatives of our species. The Herto fossils are slightly younger, about 160,000 years old, and show some intermediate features between earlier humans and modern humans. These fossils suggest that Homo sapiens were already diverse and widespread in Africa by this time.

But what about the rest of the world? When did Homo sapiens leave Africa and colonize other continents? And did they encounter and interbreed with other human species that were already living there? The answers to these questions could be clearer, as different sources of evidence may give different results. For example, genetic studies indicate that modern humans outside of Africa share some DNA with Neanderthals and Denisovans, two extinct human species that lived in Eurasia until about 40,000 years ago. This implies some gene flow between these groups after Homo sapiens left Africa. However, the timing and extent of this interbreeding is still debated. Around 20,000 years ago, we have evidence of Neanderthal DNA making it back into Africa, giving some DNA to sub-Saharan populations there, albeit a much smaller amount. 

One way to estimate when Homo sapiens migrated out of Africa is to look at the oldest fossils of our species found outside of the continent. The earliest such fossils are from Israel (Skhul and Qafzeh), dating to about 100,000 years ago. However, these populations may not have been successful or widespread, as they seem to have disappeared or been replaced by Neanderthals later on. The next oldest fossils are from China (Liujiang) and Australia (Lake Mungo), dating to about 70,000 years ago. These fossils suggest that Homo sapiens had reached Asia and Oceania by this time, possibly using coastal routes along the Indian Ocean.

However, some genetic studies suggest that Homo sapiens may have left Africa earlier than the fossil evidence indicates. For example, one study found that some modern populations in Papua New Guinea have traces of DNA from an unknown human group that split from the African lineage about 120,000 years ago. This implies that some Homo sapiens may have reached Oceania before 70,000 years ago. Another study found that some modern populations in East Asia have traces of DNA from a group that split from the African lineage about 80,000 years ago . This implies that some Homo sapiens may have reached Asia before 70,000 years ago.

So where do Homo sapiens come from? The answer is not simple or straightforward. We are a complex and diverse species that evolved in Africa from an earlier human ancestor but also interacted and exchanged genes with other human species outside of Africa. We have a long and rich history that spans multiple continents and climates. We are not just one thing or one place; we are many things and many places. And we can learn a lot from our fossils and our DNA about who we are and where we came from.

Take a look at the skull of a contender for the worlds oldest modern human :

Sources:

 Human evolution | History, Stages, Timeline, Tree, Chart … – Britannica

 Homo sapiens – The Smithsonian’s Human Origins Program

 Homo sapiens | Meaning & Stages of Human Evolution | Britannica

 Homo sapiens and early human migration – Khan Academy

Could Neanderthals Speak?

Co-Authored with the New Bing

Did Neanderthals have what we would recognize as human-like speech? Did they have the morphology to produce the same or similar sounds as we can make? How do we know this? What evidence is there for them being able to speak? What evidence is there against it?

These are some of the questions that have fascinated researchers for decades, ever since the discovery of the first Neanderthal fossils. Speech is one of the most distinctive features of modern humans, and it is closely related to our cognitive and social abilities. But did our closest extinct relatives, the Neanderthals, share this capacity with us?

One of the critical anatomical structures involved in speech production is the hyoid bone, a horseshoe-shaped bone in the neck that supports the tongue and the larynx. The shape and position of the hyoid bone affect the size and shape of the vocal tract, influencing the range and quality of sounds that can be produced. Modern humans have a hyoid bone that is high and forward in the neck, allowing for a long and flexible vocal tract that can produce a variety of vowels and consonants. In contrast, most non-human primates have a low and backward hyoid bone, resulting in a short and rigid vocal tract that limits their vocal repertoire.

The first Neanderthal hyoid bone was discovered in 1989 in Israel, remarkably similar to modern humans. This suggested that Neanderthals had a vocal tract capable of producing human-like speech sounds. However, some researchers argued that the shape of the hyoid bone alone was insufficient to infer speech abilities and that other factors, such as the position of the larynx, the innervation of the tongue, and the brain structures involved in language processing, also needed to be considered.

Since then, more evidence has emerged to support the idea that Neanderthals could speak like modern humans. A recent study used computerized tomography scans and a comprehensive model from the field of auditory bioengineering to reconstruct the sound transmission through the outer and middle ear of Neanderthals. The results showed that Neanderthals had similar hearing capacities to modern humans, especially in the frequency range of human speech (1–6 kHz). This implies that Neanderthals evolved the auditory system to support a vocal communication system as efficient as modern human speech.

Another study used computer simulations to estimate the acoustic and articulatory potential of the Neanderthal vocal tract based on cranial anatomy and hyoid bone morphology. The results showed that Neanderthals could produce a range of vowels that overlapped with modern humans and some consonants. The authors concluded that Neanderthals had an articulatory capacity comparable to that of modern humans and that there was no reason to assume that they could not speak.

However, not all researchers agree that Neanderthals had human-like speech. Some have pointed out that speech is not only a matter of anatomy but also of cognition and culture. They have argued that speech requires symbolic thinking, complex grammar, and social learning, which may have been absent or limited in Neanderthals. However, as anyone up to date with Neanderthal research knows, they were extraordinarily complex beings with powerful minds and colorful cultures. They have also suggested that there may be other anatomical differences between Neanderthals and modern humans that could have affected their speech production, such as the shape of the thorax, the rib cage, and the diaphragm.

In conclusion, there is no definitive answer to whether Neanderthals could speak like modern humans. The available evidence suggests that they had similar auditory and vocal capacities to us, but there may have been other factors that influenced their communication abilities. More fossil discoveries and new analysis methods may shed more light on this intriguing question in the future.

Sources:

: Arensburg B., Schepartz L.A., Tillier A.M., Vandermeersch B., Rak Y. (1989). A reappraisal of Homo neanderthalensis from Kebara Cave (Israel). American Journal of Physical Anthropology 79: 335–345.

: Lieberman P. (2007). Current views on Neanderthal speech capabilities: A reply to Boe et al. (2002). Journal of Phonetics 35: 552–563.

: Conde-Valverde M., Martínez I., Quam R.M., Rosa M., Velez A.D., Lorenzo C., Jarabo P., Bermúdez de Castro J.M., Carbonell E., Arsuaga J.L. (2020)

Paleoanthropology is a Challenging, but Rewarding Field!

Co-Authored with the New Bing

Paleoanthropology is the scientific study of human evolution. It is an interdisciplinary branch of Anthropology that combines physical anthropology, comparative anatomy, archaeology, geology, ethnology, and the theory of evolution. Paleoanthropologists search for the roots of human physical traits and behavior and seek to discover how evolution has shaped the potentials, tendencies, and limitations of our species [1] [2].

However, paleoanthropology is a challenging discipline. It faces many challenges and difficulties in its quest to reconstruct a story of hominin evolution. Some of these challenges are:

– Fossil scarcity: Hominin fossils tend to be few and far between. It is common for long periods of time to exist for which there are few fossils documenting the supposedly occur. This makes it hard to fill in the gaps and test hypotheses about evolutionary relationships and transitions [3].

– Fossil fragmentation: Typical hominin fossils consist literally of mere bone fragments, making it difficult to make definitive conclusions about the morphology, behavior, and relationships of many specimens. Often, paleoanthropologists rely on statistical methods, computer models, or analogies with living primates to infer hominin anatomy and ecology [3].

– Dating uncertainty: Dating of fossils by geologic strata, chemical tests, or radioactive-decay rates requires knowledge of the physical sciences. However, these methods are only sometimes precise or reliable and can sometimes produce conflicting results. Moreover, some fossils are found in contexts that make dating impossible or unreliable [2].

– Interpretation bias: Paleoanthropologists are human beings with their own backgrounds, perspectives, and agendas. They may interpret the same fossil evidence differently based on their theoretical frameworks, assumptions, or preferences. They may also be influenced by external factors such as funding sources, peer pressure, or media attention [3].

– Scientific change: Paleoanthropology is a dynamic field constantly evolving with new discoveries, methods, and technologies. However, this also means that paleoanthropologists must keep up with the revolutionary changes occurring in the other natural sciences and take full advantage of those changes to maintain paleontology’s role as the primary interpreter of the history of life on Earth [4].

These challenges make paleoanthropology a competitive and controversial field. Paleoanthropologists often debate and disagree over various aspects of hominin evolution. There is no single authority or consensus in the field; instead, multiple schools of thought and lines of evidence support different views and hypotheses [3]. The area progresses by testing and revising these hypotheses with new data and analyses.

Paleoanthropology is also a fascinating and rewarding field. It offers insights into our origins and our place in nature. It helps us understand our similarities and differences and diversity and unity with other species. It stimulates our curiosity and imagination about humanity’s past and future [1] [2].

Some of the rewards of paleoanthropology are:

– Discovering new fossils and artifacts that shed light on our ancestors and their behavior, culture, and environment.

– Interpreting the data and reconstructing the life history, phylogeny, and adaptations of extinct hominins and their relatives.

– Collaborating with other researchers from different disciplines such as archaeology, genetics, geology, and ecology to gain a holistic perspective on human evolution.

– Communicating the findings and implications of paleoanthropology to the public and inspiring the next generation of scientists and educators.

– Contributing to the preservation and conservation of our shared heritage and biodiversity.

Paleoanthropology is not without its challenges, such as finding funding, dealing with ethical issues, coping with harsh field conditions, and resolving conflicting interpretations. However, for those who are passionate about human origins and evolution, paleoanthropology is a rewarding career that offers endless opportunities for learning, discovery, and innovation.

Sources:

[1] https://humanorigins.si.edu/education/introduction-human-evolution

[2] https://www.britannica.com/science/paleoanthropology

[3] https://evolutionnews.org/2012/07/the_fragmented_/

[4] https://www.frontiersin.org/articles/10.3389/feart.2015.00009/full

The Last Common Ancestor of Chimps and Humans?

Co-Authored with the New Bing

A question that is often asked of anthropologists is how related we are to chimpanzees, bonobos, and the other great apes. The answer is that we are very related, in fact, we share 98% of our DNA with chimps and bonobos. But why is this? The short answer is that we share a recent last common ancestor, or “LCA”, this means that our two species diverged from the same ancestor somewhat recently in geologic time, about 6-7 million years ago.

The last common ancestor of chimps and Homo sapiens is a fascinating topic in Paleoanthropology, as it sheds light on our closest living relatives’ evolutionary history and divergence. However, identifying and characterizing this ancestor is difficult, as many uncertainties and controversies surrounding its morphology, behavior, ecology, and genetics exist.

One of the first challenges is to estimate when the last common ancestor (LCA) lived. This can be done by comparing the DNA sequences of living, also known as extant, humans and chimps and calculating how long it would take for them to accumulate the observed differences due to mutations. This method, known as the Molecular Clock, gives the LCA an approximate date of 6 to 7 million years ago (mya). However, this date may not be accurate, as different genes may evolve at different rates, and there may have been episodes of gene flow or hybridization between the two lineages after their initial split. Therefore, fossil evidence is also crucial to corroborate or refine the molecular estimates.

Unfortunately, the fossil record of the LCA and its early descendants is very scarce and fragmentary. Most of the fossils that have been attributed to this period are from Africa, where the LCA is presumed to have originated. However, some recent discoveries suggest that Europe may also have played a role in the evolution of hominins (the human clade). For example, Graecopithecus, a fossil ape from Greece and Bulgaria, has been dated to about 7.2 mya and has some dental features that resemble those of hominins. Some researchers have proposed that Graecopithecus may represent the LCA or a close relative, implying that the split between humans and chimps occurred in Europe rather than Africa. However, this hypothesis is controversial and not widely accepted by most Paleoanthropologists.

Another challenge is to reconstruct what the LCA looked like and how it behaved. Many researchers have assumed that the LCA was similar to a modern chimpanzee, based on the idea that chimps have retained more primitive traits than humans. However, this view has been challenged by recent studies that show that both humans and chimps have evolved many unique features since their divergence from the LCA. For example, chimps have more genes modified by natural selection than humans, suggesting that they have adapted to their specific environments and lifestyles. Moreover, chimps exhibit a great diversity of behaviors across different populations and regions, indicating that they are not static or uniform in their culture and ecology.

Therefore, it is likely that the LCA was different from both humans and chimps in many aspects. Some possible characteristics of the LCA that various researchers have suggested are:

– It was bipedal, at least partially, as this trait is shared by all hominins and may have originated before the split from chimps.

– It had a relatively small brain size, similar to or slightly larger than that of a modern chimp.

– It had a mixed diet of fruits, leaves, nuts, seeds and animal foods, as indicated by its dental morphology and isotopic signatures.

– It lived in a mosaic habitat of woodlands and grasslands, as inferred from its locomotion and diet adaptations.

– It had a complex social structure and communication system, as these are common features of all apes and may have been present in their common ancestor.

Of course, these are only tentative hypotheses based on limited evidence and may change as new fossils and genetic data are discovered. The LCA remains a mysterious and elusive entity in our evolutionary history, but also a fascinating one that can help us understand ourselves better.

Sources:

– The last common ancestor of humans and chimps probably wasn’t much like either – Science News

– Gorilla–human last common ancestor – Wikipedia

– Here’s What the Last Common Ancestor of Apes and Humans Looked Like – Live Science

The Story of Us-Survival Archaeology with Dr. John Shea

On this episode #TheStoryofUs , we are joined by well-known Paleoanthropologist Professor John Shea, a prominent lithic and survival expert. We talk about his new book, The Unstoppable Human Species. It details our evolution and survival through the lens of function over what was required to survive in the harsh environments that our forebears found themselves in. We learn about stone tool industries, what they are, and what they are not. We travel through time and see what it would have been like to be in some of the situations that our ancestors were in, and to see how we would deal with it today – to realize it is not all that different! We had a great chat; I loved having Dr. Shea on, and his book was a joy to read, and I can’t wait for you guys to watch this chat and learn something new! I know I sure did! Remember, there is always more to learn!

To grab a copy of Dr. Shea’s new book, you can find it here:

See you guys next time! Be sure to like and subscribe for more episodes, and hit that reminders button never to miss a new episode!