A two-week expedition off the coast of Brazil has identified 31 previously unknown deep-sea species, many with forms so ...

The plants outside your window carry a hidden geography. Many arrived from distant continents. A new global forecast shows that mix is about to shift, in ways few people notice until it takes hold.

At nearly twice Earth's size with a denser atmosphere, this fictional world hosts creatures that dwarf anything alive today, including a structure-sized organism called the Blitz Spire.

Originally published in the January 1970 issue of National Geographic. In remote African highlands, a daring American woman ...

Are aliens real? Was Fox Mulder right all along? We examine the prediction markets to gauge if the U.S. government will confirm that aliens exist before January 2029. The prediction market on a U.S.

In M. John Harrison’s​ short story ‘The Crisis’, first published in 2017, the world has been invaded by aliens that look like ...