Cousins All

From Science Daily:

'Most Recent Common Ancestor' Of All Living Humans Surprisingly Recent:

"In this week's issue of Nature, a Yale mathematician presents models showing that the most recent person who was a direct ancestor of all humans currently alive may have lived just a few thousand years ago.

'While we may not all be 'brothers,' the models suggest we are all hundredth cousins or so,' said Joseph T. Chang, professor in the Department of Statistics at Yale University and senior author on the paper."