˗ˏˋ modern homo sapiens ´ˎ˗ Flashcards
what type of traits do humans have?
mosaic (gradually and out of sync with one another).
what are human skeletal traits?
- modern skeleton is considered gracile (thinner and smoother)
- modern have a more globular braincase
- forehead tied to frontal lobe expansion
what is a brain case?
upper and back part of the skull, which forms a protective case around the brain.
what is a supraorbital torus?
bony ridge across the top of the eye orbits on many hominin crania.
what is a mental eminence?
- chin on the mandible of modern homo sapiens
- one of the defining traits of our species
why do modern homo sapiens have a different frame?
- better for long-distance running
- cools an active body in hotter climates
what is a generalist-specialist niche?
- ability to survive in a variety of environments by developing local expertise
- evolution toward this niche may have been what allowed modern homo sapiens to expand past the geographical range of other human species
what is african muliregionalism?
- idea that modern homo sapiens evolved as a complex web of small regional populations with sporadic gene flow among them
- gracile frame and neurological anatomy allowed modern humans to survive and flourish in a variety of environments
what are early modern homo sapiens (or early anatomically modern humans)?
- refers to transitional fossils between archaic modern homo sapiens that have a mosaic of traits.
- humans like ourselves, who mostly lack archaic traits, are referred to as late modern homo sapiens and simply anatomically modern humans
what is jebel irhoud?
- jebel irhoud, morocco
- site where at least five individuals were found, representing life stages from childhood to adulthood
what is the lower omo valley?
- in ethiopia
- omo kibish hominins
- site where three individuals were found dating back 233,000 years ago
what is herto?
- in ethiopia
- site where fossilized crania of two adults and a child were found, along with fragments of other individuals (unidentified)
- stone tools found
what is the middle stone age?
time period known for mousterian lithics that connects african archaic to modern homo sapiens.
what is the late stone age?
time period following the middle stone age with a diversification in tool types, starting around 50,000 years ago.
why did stone tools from the middle stone age remain the same?
- all similar because if not broke, don’t fix it
- no art has been found in this time period (yet)
what is the blombos cave, south africa?
- located along the present shore of the cape of africa
- toolmaking and artistry were more complex than previously thought for middle stone age
- found on site: two intact ochre-processing kits, 100,000 years ago and marine snail shell beads dating 75,000 years ago
- complexity shows a deep understanding of and relationship with the surrounding landscape
what is the border cave, south africa?
- dated in the later stone age
- changes in technology dating around 43,000 years ago
- stone-tool production changed from slower to faster processes
- microliths (small and precise stone tools, also called bladelets)
- also found on site: beads made of ostrich eggs
what are the main ideas of modern homo sapiens in africa?
- finds like in jebel irhoud show that early modern homo sapiens had a wide range across middle pleistocene africa
- change from the middle Stone Age to later stone age was fast but not immediate
- emergence of culture evidenced by art (beads)
- our ability to adapt helped us spread knowledge of tool making and art throughout different groups