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Lecture 8

Lecture 8.doc

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University of Toronto Scarborough

Lecture 8Early HomoOrder they were discoveredknow difference between hominins and hominoidsMiocene adaptive of apes58 million years ago we split from chimps3 different parts of australopithecines stil look like apesaustrolopithecines small brain apes walking on two legshomo habilis found in south and east Africa oldawan tools start to appear earlier than species found in fossil evidencetime frame of x axis we have considerable overlap of homo specimans and the end of the gracile periods taung child mrs ples forms and the robust forms 15 million year overlap where they are living together at the sametimeshow same data left on goes back 20 million years right goes back 2 million yearsleft chartfrom the Miocene to the Pleistocene based on oxygen isotopes we see major cooling of the planet 16 million years ago to the present we see the curve going towards the coldpast 2 million years on the right many more episodes of ice covering the planet especially at the poles all about fluctuation and rapid changepunctuated equilibrium after darwins publication of his book wrote a second book on the descent of man saying humans were evolved after he died so people wouldnt be madhe figured we could evidence of it in Africa of man existing back then because chimps and gorillas lived in Africa who look like us the most rather than the orangutans from asiahe wasnt the only one to make this suggestion scientists accepted natural selection but went to asia to check out orangutans cause they felt we looked like them more
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