Explain evolution of homosapiens
Answers
Answer:
Before about 1980 it was widely thought that distinctively hominin fossils could be identified from 14 to 12 million years ago (mya). However, during the 1970s geneticists introduced the use of molecular clocks to calculate how long species had been separated from a common ancestor. The molecular clock concept is based on an assumed regularity in the accumulation of tiny changes in the genetic codes of humans and other organisms. Use of this concept, together with a reanalysis of the fossil record, moved the estimated time of the evolutionary split between apes and human ancestors forward to as recently as about 5 mya. Since then the molecular data emerging from DNA sequencing and a steady trickle of new hominin fossil finds have pushed the earliest putative hominin ancestry back in time somewhat, to perhaps 8–6 mya.
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Explanation:
Homo sapiens, like our Homo heidelbergensis and Homo erectus ancestors before us, evolved in Africa – around 180,000 years ago – and then travelled north into Eurasia. Most current accounts, drawn from the fossil record and studies of both ancient and modern human DNA, suggest that they did this not once, but twice.