The world's smallest sauropod dinosaur tracks were discovered in Southwest China's Xizang Autonomous Region recently, ...

This story appears in the August 2010 issue of National Geographic magazine. Thirty-seven million years ago, in the waters of the prehistoric Tethys Ocean, a sinuous, 50-foot-long beast with ...

Spanning 1.2 million square miles (3.1 million square kilometers) and located southwest of India, the gravity hole’s formation is tied to the ancient Tethys Ocean and complex mantle processes.

Areas near the coast were pummeled by seasonal monsoons, but ocean-circulation patterns kept the isolated and vast interior warm and dry. Even the Poles were ice-free. The Tethys Ocean filled the ...

Homer claims Oceanus and Tethys, pictured in the lower half of this mosaic, were responsible for the birth of the gods, but Hesiod's version of the origins is generally accepted (see Gypsy Girl).