01:070:111 Lecture Notes - Lecture 21: Cranial Vault, Confidence Interval, Homo Floresiensis
27 Mar 2018
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Document Summary
7-8 million years ago- when humans and chimpanzees diverged. Forces that might lead to isolation (reproductive isolation) and different environmental conditions. What is the turnover-pulse model: periodic disturbance extinction, extinction (possibly specialists- focused on a particular niche, speciation (possibly new specialists) creating isolation and fragmentation of habitats. Species that are more specialized have a greater chance of extinction. Calculated insolation- solar insolation is the amount of electromagnetic energy, or solar radiation, received at a point on the earth"s surface climate change. In other words, are extinction caused in pulses of sudden climate change: lads are clustered together turnover pulse model, lads are continuous and random constant turnover model. Grey zone and dotted line- expected data, simulated. Black- empirical, 2 occasions that the dark line falls outside the 95% confidence interval for constant turnover simulation pulse of extinction. On migrating out of africa, humans encountered archaic humans, residents of eurasia for more than 200 ky.
