Thursday, September 29, 2016
Modern humans evolved in Africa roughly 200,000 years ago with the use of fire, the beginning development of language and other modern behaviors. At this time, they continued the natural tendency of all prior hominid ancestors to migrate into new territories, which meant also migrating out of Africa previous to this time.
Those that migrated out of Africa before the Toba extinction event 75,000 years ago are referred to as the "first wave" (actually a series of waves). Those that migrated later are the "second wave". Though almost all the DNA from non-Africans today are traceable to the second wave, in New Guinea, 2% of their DNA is of the first wave.
Super Volcanic Eruption 75,000 years ago drives modern humans close to extinction