More than 2,500 alien plant species could find suitable conditions in the Arctic, especially in northern Norway and Svalbard.

Senior figures from inside the U.S. military and intelligence world are now openly suggesting that the government has encountered technology and even “biologics” that are not human, even as official ...

For centuries, humans have gazed at the stars and wondered whether we are alone in the universe. The question of extraterrestrial life is one of science, philosophy, and pop culture's most enduring ...