Biological Anthropology Study Notes

Biological Anthropology Study Notes
Course Information

  • Course: ANTH*1120

  • Instructor: Prof. Travis Steffens

  • Semester: Winter 2026

  • Week: 9

Last Class Overview

  • Topics Covered:
        - Hominin Taxonomy: Classification and understanding of various hominin species.
        - Definitions of hominid and hominin: Hominids include all great apes and their ancestors, while hominins refer specifically to humans and their extinct relatives.
        - Defining features of hominins: Characteristics such as bipedalism, larger brain size, and tool use that distinguish hominins from other primates.
        - Discussion of Australopithecines: Examination of their significance in human evolution, focusing on both physical traits and their placement on the hominin tree.
        - Introduction to the Genus Homo: Overview of the important features and evolution of species within this genus.

The Origin of the Genus Homo

  • Timeframe of Origin: Most anthropologists date the origin of the Genus Homo to around 2.5 million years ago (mya). This timeline coincides with the appearance of the first stone tools—which not only indicates the dietary shift to include meat but also suggests cognitive advancements in problem-solving and planning, marking a significant evolutionary development in hominins.

Hominin Phylogeny

  • Diagram of Hominin Phylogeny (after Dembo et al. 2016):
        - Sahelanthropus tchadensis
        - Ardipithecus ramidus
        - Australopithecus anamensis
        - Australopithecus afarensis
        - Kenyanthropus platyops
        - Australopithecus africanus
        - Australopithecus garhi
        - Australopithecus sediba
        - Paranthropus aethiopicus
        - Paranthropus robustus
        - Paranthropus boisei
        - Homo habilis
        - Homo rudolfensis
        - Homo erectus
        - Homo floresiensis
        - Homo naledi
        - Homo heidelbergensis
        - Homo neanderthalensis
        - Homo sapiens
        - Homo antecessor

  • Timeline: Presented in millions of years ago (Ma), highlighting significant evolutionary developments and interrelations among hominin species.

Major Hominin Milestones

  • 8 Ma to present reveals a timeline of hominin evolution, illustrating the emergence of various species mentioned above, including critical adaptations such as bipedal locomotion, which significantly influenced survivability and migration patterns.

This Class: Archaic Homo sapiens

  • Key Topics:
        - Shifting environmental conditions during the Pleistocene: Exploration of how climate fluctuations shaped the evolution and behavior of archaic Homo sapien populations.
        - Definition and characteristics of archaic Homo and Homo sapiens: Discussion on anatomical differences, tools used, and social structures of these groups.
        - Understanding modern Homo sapiens: Study of the cognitive abilities, cultural practices, and adaptive strategies that define modern humans.