Two-Meter-Long Fossil of Lobster-Like Animal That Swam the Seas 480 Million ... the fossil of an ancient human-sized lobster in the Sahara Desert which gave them new insights regarding the creature.

Remi Benali / Corbis The Sahara ... Mecca. Desert caravans were the source of Chinguetti's economic prosperity, with as many as 30,000 camels gathering there at the same time. The animals, which ...

The desert covers over 3.3 million square miles, which means it's roughly the same size as the entire United States.

Sahara Desert, Once Lush and Green ... This suggests they remained genetically isolated despite practicing animal husbandry - a cultural innovation that originated outside Africa," Krause said.