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Lecture 4

ANTA01H3 Lecture Notes - Lecture 4: Walking With Cavemen, Paranthropus Boisei, Homo Habilis

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Genevieve Dewar

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Tuesday, October 17, 2017
Walking With Cavemen
-Started in Africa (300,000 generations ago) Australopithecus afarensis
“Lucy” - Her troop was in a war with a rival group (fought using noise but later can
turn into violence)
What set these creatures apart from other apes was that they can stand and walk
on two legs (but nothing else that’s remarkable about them)
-8 million years ago in Africa, these creatures used both their hands and feet to
get around the dense forest (Africa was covered in dense forest from edge to
-The ocean floor is expanding, changing the face of the planet, India was formed,
the himalaya mountains were created, had an affect on the world’s weather, the
monsoons, the led Africa to now be very dry. The dense forests no longer
existed. The great rift valley created in Africa.
-Forced to spend more time on the ground and evolve to walk on two legs
-Upright advantages: can see better but con: predators can spot them better
-But the ultimate advantage is for sex (walking on two legs is more energy
efficient, so the energy can be used for sex)
Ancestors of humans
In 1974 they discovered her fossil and named her “Lucy” because that was the
song play at the time by the Beetles
-East Africa (2 million years ago) Paranthropus boisei (gorilla like) & Homo habilis
So many different type of 2 legged ape men
-Why? B/c of the sun. As the Earth orbits the sun it’s on a tilt, and gives us
seasons (the greater the tilt the more severe) Ice didn’t melt properly in the
summer, and ice caps grew, Earth dried out, Africa turned more into a desert.
Grass began to emerge and new creatures have evolved to eat it. !
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