ANTHR219 Lecture Notes - Lecture 9: Homo Erectus, Milankovitch Cycles, Oxygen-18
1 Oct 2016
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Genus homo= having a bigger brain size (cranial capacity) 1. 8 mya, starts picking up in africa the first humans that have some kind of limb proportions that you see today (homo erectus) Onset of global glaciation started around 2. 6 mya, and ended at the end of the last ice age. Regular cycling since then between cold and warm periods (bulk of later human evolution happening in periods of constant flux between periods of dry/cold and short warm periods. Stadial (within glacial period there can be colder stages, not as long) The notion of regular cyclical changes started 2. 5 mya, recognized in geological deposits when you have periods of sediments that represent things that accumulated at or near big ice fields. Came up with mathematical models that were based on where the sun is relative to the earth at different times/ periods. Eccentricity: of orbit around the sun, shifts from ellipse to more circular and back.
