The closure of the ancient Tethys Seaway has left an indelible mark on Earth’s history. As tectonic forces slowly reshaped ...

As the Earth's crust shifted and groaned over millions of years, something extraordinary happened beneath the surface. Deep ...

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 ...

Earth's deepest gravitational anomaly, known as the "gravity hole," lies 1,200 km southwest of India in the Indian Ocean. Spanning ... fragments from Tethys disrupted high-density material in ...

It all traces back to the slow closure of an ancient ocean known as the Tethys Seaway. Once stretching between the Atlantic and the Indo-Pacific, this vast seaway shaped the world in powerful ways.