CARTA - Anthropogeny (Audio)

Unlike all other free-living animals, human populations need to eat much of their food cooked. We now know that cooking causes starch and meat to provide much extra energy; that cooked food saves so much eating time that it makes dedicated hunting possible; and that honey-eating by African hunter-gatherers offers a remarkable clue that the control of fire is an ancient habit. From an evolutionary...

Peter Ungar (Univ of Arkansas) looks at the fossil record to determine what it can teach us about the diets of our early hominin forebears. Evidence from tooth chemistry and microscopic wear suggests that some species had increasingly specialized diets, but others, including those of early Homo, ate a broader variety of foods. Series: "CARTA - Center for Academic Research and Training in Anthropog...

Alyssa Crittenden (Univ of Nevada, Las Vegas) reports on the diet composition and foraging profiles of the Hadza hunter-gatherers of Tanzania. The significance of meat, tubers, and honey is addresses and the role that these food items play in evolutionary models is explored. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Health and Medicine] [Science] [Show ID: 24837]

In this presentation, Leslie Aiello (Wenner Gren Foundation) provides some background for the discussion and defines the overall goal of the symposium, The Evolution of Human Nutrition, which is to highlight the evolution of human nutrition from our earliest ancestors to the modern day and to draw attention to the diversity in the human diet and its consequences. Series: "CARTA - Center for Academ...

Tracing the evolution of the human diet from our earliest ancestors can lead to a better understanding of human adaptation in the past. It may also offer clues to the origin of many health problems we currently face, such as obesity and chronic disease. This fascinating series of talks focuses on the changing diets of our ancestors and what role these dietary transitions played in the evolution of...

Tracing the evolution of the human diet from our earliest ancestors can lead to a better understanding of human adaptation in the past. It may also offer clues to the origin of many health problems we currently face, such as obesity and chronic disease. This fascinating series of talks focuses on the changing diets of our ancestors and what role these dietary transitions played in the evolution of...

Indo-European languages are native to populations from Ireland to Afghanistan and India and, in historical times, to the Tarim Basin in China. This spread occurred within a few thousand years carried by people who were mostly horse pastoralists and who carried a mutant regulator of the lactase gene so that they could as adults digest milk sugar. Henry Harpending, University of Utah, discusses how...

In most individuals, the ability to digest lactose, the sugar present in milk, declines rapidly after weaning because of decreasing levels of the enzyme lactase in the small intestine. However, there are individuals who maintain the ability to digest milk into adulthood due to a genetic adaptation in populations that have a history of pastoralism. Sarah Tishkoff, University of Pennsylvania, presen...

As our australopithecine ancestors moved out of receding rain forests and into drier habitats, they abandoned a primarily fruit-based diet and began consuming more meat and tubers. This increase in consumption of protein, fat, and starch coincided in time with important evolutionary changes in cognition and brain size. Gregory Wray, Duke University, discusses how genetic and genomic methods are pr...

The history of human evolution and dispersal was associated with remarkable environmental challenges to those processes that maintain stable physiological conditions. Indeed, environmental change over time and over space has been a major feature of human evolution. Though many adaptations undoubtedly occurred at the cultural and behavioral levels, the striking variation of human phenotypes suggest...

In the classic nature-nurture dichotomy, nature has a stronger or weaker influence on nurture, but certainly nurture was supposed to have no impact on nature. Human culture is often taken to be a form of nurture. However, culture itself has evolutionary properties. In particular, culture generates novel environments that in turn select for novel genes. A few dramatic cases of this effect are well...

What constitutes the essential behavior of our species is contentious. Evolutionary scenarios leading to both the capacity for and practice of these essential behaviors are even more debated. Genetics, cognitive and evolutionary psychology, morphology, reconstructions of climate variation, and the archaeology of human behavior all provide pathways to explore these questions. This presentation by A...

Leslie Aiello (Wenner-Gren Foundation for Anthropological Research) reviews the historical development of ideas in relation to the evolution of bipediality. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 23670]

The fastest humans sprint slowly and for very limited durations compared to most quadrupedal mammals, but even average humans have superlative long distance running capabilities in terms of speed and distance compared to other mammals, especially in the heat. Dan Lieberman (Harvard University) posits that these abilities raise the question of how to evaluate when and how adaptations for running ev...

Christopher Ruff (Johns Hopkins University) interprets the analyses of forelimb and hindlimb bone strength in a number of early hominin taxa. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 23668]

Carol Ward (University of Missouri) reviews the growing, although still imperfect, evidence for torso form in apes and early hominins, and relates that to hypotheses about the origins and early evolution of hominin bipedality. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 23667]

Efforts to reconstruct gait and other aspects of behavior in extinct hominins continue to be hampered by disagreements over how to interpret anatomical evidence from the fossil record. Brian Richmond (George Washington University) offers unique evidence about early Pleistocene hominin gait and foot shape based on his recent discovery of hominin footprints in the Koobi Fora Formation, Kenya (1.52 M...

Jeremy DeSilva (Boston University) shares his insights into the foot and ankle diversity of australopiths and refutes the hypothesis that there is only one kinematic way to be a striding biped. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 23664]

Steven Churchill (Duke University) talks about the evolution of the human pelvis and the major architectural changes which reflect an improvement in the ability of this structure to engage in bipedal locomotion. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 23663]

Tracing the evolution of the human diet from our earliest ancestors can lead to a better understanding of human adaptation in the past. It may also offer clues to the origin of many health problems we currently face, such as obesity and chronic disease. This fascinating series of talks focuses on the changing diets of our ancestors and what role these dietary transitions played in the evolution of...

Tracing the evolution of the human diet from our earliest ancestors can lead to a better understanding of human adaptation in the past. It may also offer clues to the origin of many health problems we currently face, such as obesity and chronic disease. This fascinating series of talks focuses on the changing diets of our ancestors and what role these dietary transitions played in the evolution of...

V.S. Ramachandran (UC San Diego) explains how his interest in Autism Spectrum Disorders (ASD) stems from an earlier, and broader, interest in mirror neurons and their dysfunction (and restitution of function) in neurology. He begins with a brief survey of the mirror neuron system (MNS) and then makes specific predictions of what to expect from their dysfunction in neurological populations with str...

Autism affects males much more often than females. The explanation for this must either lie in diagnostic practice, hormones, genetics, or (most likely) a mix of all three factors. In this talk, Simon Baron-Cohen (Univ of Cambridge) summarizes 5 lines of investigation from his lab that suggest baby's sex steroid hormones are a key part of the puzzle of autism. Series: "CARTA - Center for Academic...

Bernard Crespi (Simon Fraser University) describes a simple model, based in evolutionary biology, neurodevelopment, and genetics, for understanding how the primary features of autism are related to the major neuroanatomical and cognitive traits that are highly-developed or unique to the human lineage. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Science] [Show ID: 2...

Daniel Geschwind (UCLA) and his colleagues have been working to identify autism risk genes and understand how these might lead to autism spectrum disorders (ASD). Many genes with distinct functions have been identified as ASD susceptibility genes. In this lecture, he indicates how systems biology approaches demonstrate that pathways necessary for normal brain development and function are altered i...