Limestone rocks found high on the mountain contain remains of marine organisms that once lived in the ancient Tethys Sea.

Prem Chapagain can usually be found in his lab, modeling atoms and electrons to understand how proteins fold and viruses replicate — research that could lead to new treatments for disease or vaccines.

A 100-foot unstable ice serac in the Khumbu Icefall has delayed the opening of Mount Everest's main climbing route from Nepal ...