Online free video chat with aunties - Dna mutations dating migrations lesson

Newer research estimated the mutation rate in modern human families based on DNA from the nucleus, which involved another way of getting at the common ancestor timing.

That method suggested humans were racking up genetic mutations at half the rate — meaning to reach the genetic differences we see today humans would've had to leave Africa more than 200,000 years ago.

It seems unlikely that all of those dates are wrong.

To sort out the problem, the researchers extracted mitochondrial DNA from 11 ancient human fossil skeletons from Europe and Asia.

Using radioactive carbon dating, the oldest was estimated to be 40,000 years old, while the most recent came from medieval times.

Our early human ancestors may have left Africa more recently than thought, between 62,000 and 95,000 years ago, suggests a new analysis of genetic material from fossil skeletons.

The new findings are in line with earlier estimates, but contradict a more recent study that put humans' first exodus from Africa least 200,000 years ago.

Last modified 18-Oct-2015 19:15