Planet Earth

This 2018 astronaut photo shows a striking section of the Green River as it winds through Utah's "Labyrinth Canyon." The canyon's steep walls cast long shadows that hide many secrets, including caves and abandoned uranium mines.

During 37 years of operations, the now-closed Argyle mine produced more than 865 million carats (191 tons) of rough diamonds and 90% of the world's pink diamonds.

An ocean that opened up in what is now Mongolia 410 million years ago was created by a hot upwelling of rock known as a mantle plume.

A 2017 satellite image of the Sahara's Tanezrouft Basin shows the abstract beauty in ancient rock folds and colorful salt flats that have been sculpted in this terrifying region over millions of years.

Lucy is popularly depicted as being hairy, but new evidence suggests she wasn't. The discovery prompts new questions about the history of nudity.

A microbe can grow a neck that is 30 times as long as its body in just a few seconds. Origami folding explains how

Geologists set Turkmenistan's Darvaza gas crater ablaze in 1971, thinking the fire would die down within a few weeks, but the pit is still burning 53 years later.

"There was this gigantic river system": Researchers find ancient lost world deep beneath Antarctic ice.

New research suggests that runoff from the Greenland Ice Sheet could prevent icebergs from disrupting key ocean currents. But some scientists have cautioned that other factors may be at play.