Scientists are now discovering, when studying human DNA, that people might have been near extinction 70,000 years ago because of a severe draught.
Study says near extinction threatened people 70,00 years ago
http://www.chron.com/disp/story.mpl/ap/science/5728663.htmlThe same story at another site, in case one of these stories will be taken off the site.
Humans Neared Extinction 70,000 Years Ago
http://www.wpxi.com/health/15978941/detail.htmlHere are other early human DNA related stories
Human line 'nearly split in two'
http://news.bbc.co.uk/1/hi/sci/tech/7358868.stmEarly Human Populations Evolved Separately For 100,000 Years
http://www.sciencedaily.com/releases/2008/04/080424130710.htm