"The Grand Canyon is an epic Rosetta Stone for geology," Denver Museum of Nature and Science geologist James Hagadorn said.

SpaceX astronaut Jared Isaacman said frequent space travel is "around the corner." How humans will survive off-world is ...

Around 700 million years ago, the Earth cooled so much that scientists believe massive ice sheets encased the entire planet ...

Most major geological events in Earth's recent history have clustered in 27.5-million-year intervals — a pattern that ...

The century-old silent footage in "Endurance" has been revamped with a respect for its verisimilitude. I do wish, though, ...

The Arecibo message contained an image of a man only. But what might seem a sexist choice deserves a more subtle ...

Imagine a world where continents are fused into one massive landmass, and life as we know it is on the brink of ...

A rare Triassic fossil unearthed in Brazil, Gondwanax paraisensis, could provide new insights into the origins of dinosaurs.

If Earth's history were a calendar year, humans would not appear until the last few minutes before midnight on Dec. 31.

If you thought the mass extinction caused by the Chicxulub asteroid impact 65 million years ago was bad, think again. Travel ...

The existence of “Snowball Earth” is now widely accepted, but the idea ice coverage was universal is so extraordinary and ...

We know from The Lord of the Rings that Tolkien crafted endless stars in his legendarium, but are there other planets too?