C&B Notes

The History of Modern Humans

Genetic research is changing our understanding of the history of modern humans:

Instead of localizing the origin of modern humans to a single geographic region in Africa, the researchers discovered a complex record of interbreeding and genetic stratification, challenging the view of evolution in one place…  There are two main theories concerning the spread of humans out of Africa.  The dominant view holds that modern humans began to leave Africa and colonize Europe and Asia about 60,000 years ago.  The alternative “multiregional model” suggests there were several “movements” out of Africa with parallel lines of evolution around the world.  “It is possible that modern humans emerged from a non-homogeneous group,” said Mattias Jakobsson from Uppsala University, one of the authors.