Evolution

Comparative Anthropogeny (CompAnth) is the study of distinctly human traits and characteristics in the context of comparisons with our closest living relatives, the “great apes.” This symposium, the third of CARTA's CompAnth series, will present a collection of distinctive human traits, ranging from molecular, cellular, and anatomical biology to behavioral, societal, and cultural features. Given the large number of human traits for which no counterparts have yet been described in nature, the limitations of the comparative method will also be addressed and alternative approaches to the singularity that is the human phenomenon will be discussed. The goal is a better understanding of human origins and a full appreciation of our species’ planet altering effects. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39281]

Comparative Anthropogeny (CompAnth) is the study of distinctly human traits and characteristics in the context of comparisons with our closest living relatives, the “great apes.” This symposium, the third of CARTA's CompAnth series, will present a collection of distinctive human traits, ranging from molecular, cellular, and anatomical biology to behavioral, societal, and cultural features. Given the large number of human traits for which no counterparts have yet been described in nature, the limitations of the comparative method will also be addressed and alternative approaches to the singularity that is the human phenomenon will be discussed. The goal is a better understanding of human origins and a full appreciation of our species’ planet altering effects. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39280]

Human language is a strong contender for the title of most often named species-specific feature in the literature. But why is that? In this talk, Eva Wittenberg explores what we could mean by "human language", and how different conceptions of language inevitably lead to different answers about whether it is species-specific. While syntax is a central feature, it is only one of several, and the uniqueness of human language is that it arose from a combination of, perhaps, ordinary ingredients. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39277]

Human ovulation lacks visible signs, unlike chimpanzees and bonobos with conspicuous genital swellings during fertility. This led to the concept of "concealed ovulation," seen as a human adaptation. Proposed reasons include encouraging paternal investment, confusing paternity to deter infanticide, enabling secret mating and female choice, and reducing female rivalry. Many non-human primates also have unsignaled ovulation. While self-reported human mating doesn't match ovulation, debates persist on subtle reproductive cycle influences. Some cultures use menstrual taboos to disclose fertility status. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39275]

Life history theory suggests that inter-birth intervals (IBIs) depend on a trade-off between maternal investment in current and future offspring, influenced by the mother's energy and somatic maintenance. Normally, IBI aligns with maternal and infant body size, larger relative infant size leading to slower breeding. In contrast, humans have relatively shorter IBIs due to cooperative breeding, support from the social group. Some other species with cooperative behaviors also exhibit shorter IBIs, possibly aided by factors like meat-eating enabling early weaning around 2.5 million years ago in the Homo lineage. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39276]

High-altitude adaptation stands out as one of the most notable examples of evolution within our species. Despite similar challenges of decreased oxygen availability, human groups on different continents have followed unique evolutionary trajectories. I will discuss how genomic, molecular, and physiological discoveries reveal key insights into human-specific evolutionary changes, examine comparative findings and limitations, and consider alternative approaches for understanding distinct facets of this extraordinary human phenomenon. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39274]

The human genome contains segments of DNA with non-human origins. This introgressed genetic material is remnants of mating events between early modern humans and their archaic contemporaries (e.g., Neanderthals and Denisovans). In this talk, Andrew Schork will review the evidence for such genetic material, its consequences on phenotypic diversity in modern humans, and discuss if this process - archaic introgression - is typical among other great ape species. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39273]

The most complex organizations in the living world beside those of humans are the colonies of ants. Mark Moffett will argue that points of comparison between sharply different organisms like ants and humans are exceptionally valuable to science, and indeed that modern humans are in many ways much more like certain ants than we are to our nearest relatives, the chimpanzees. He considers such issues as the role of individuality and group identity in ant societies; the advantages to ants of flat organizations without leaders or hierarchies; and what we can learn from ants with respect to direct and indirect communication, self-organization, job specialization, labor coordination, and global domination. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39272]

Ethnology, also known as cross-cultural analysis or comparative anthropology, involves comparing features of historically documented human societies. It has historical ties to archaeology, with notable figures like Augustus Pitt Rivers and Lewis Binford being proponents. Despite this, it's not commonly seen as a vital archaeological tool. This talk argues for its importance, citing both theoretical and practical benefits. Including ethnology in archaeological education can expedite our understanding of patterns in the archaeological record. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39271]

Since humans split from their primate ancestors, their brains evolved with a larger mass relative to body weight, more cortical neurons, and distinct connectivity patterns. Human neurons mature more slowly, a trait known as neoteny, likely influencing these differences. Gene regulation, not new genes, may underlie species differences, particularly in the primate lineage. The role of these regulatory mechanisms in human neuron development remains poorly understood. This lecture explores the molecular factors affecting prolonged human neuron maturation and its implications for human development and neurodevelopmental diseases. Series: "CARTA - Center for Academic Research and Training in Anthropogeny" [Humanities] [Science] [Show ID: 39270]