Mega tsunamis are colossal waves triggered by geological events. Lituya Bay saw the tallest tsunami ever recorded. Hawaii ...

The Russian propagandist said the nuclear missile flight time to London from Russia's testing ground at Kapustin Yar was between 10 and 11 minutes.

Long dismissed as uninhabitable, Greenland is becoming the epicenter of 21st-century geopolitics. As the Arctic thaws, rare earth metals, oil, and gas are becoming accessible—and so is a new frontier ...