African tribe populated rest of the world
The entire human race outside Africa owes its existence to the survival of a single tribe of around 200 people who crossed the Red Sea 70,000 years ago, scientists have discovered.


By Richard Gray, Science Correspondent
Last Updated: 9:10AM BST 09 May 2009

Research by geneticists and archaeologists has allowed them to trace the origins of modern homo sapiens back to a single group of people who managed to cross from the Horn of Africa and into Arabia. From there they went on to colonise the rest of the world.

Genetic analysis of modern day human populations in Europe, Asia, Australia, North America and South America have revealed that they are all descended from these common ancestors.

It is thought that changes in the climate between 90,000 and 70,000 years ago caused sea levels to drop dramatically and allowed the crossing of the Red Sea to take place.

http://www.telegraph.co.uk/scienceandtechnology/science/sciencenews/5299351/African-tribe-populated-rest-of-the-world.html