Geologists are analyzing ancient clues to tell our origin story.
What we can learn from a massive meteor crater
We've rounded up 2014's most mind-blowing images for your viewing pleasure
Massive space rocks hurtle past Earth with frightening regularity. Some scientists want to deflect them. Others want to drag one closer.
Katrina Wolfe, a 24-year-old video game designer, wants to live and die on Mars.
With the upcoming release of the major motion picture Europa Report, a couple of Jet Propulsion Lab scientists explain how science fiction has evolved in response to our growing understanding of space.
Mars has been cold and dry for half its life, but as recently as 500 million years ago, its surface was shaped by water.
The least crazy aspect of this mission is the desire to do it.
NASA already has an orbiter for 2013 and a lander for 2016; now it has another rover in the works, too.
Looking around for methane in Gale Crater, Curiosity found a whole lot of nothing. But that doesn't dash hopes of finding evidence of life on Mars some day.
Not where you'd think.
The simple tricks to fool Earth-evolved humans into living on Mars time.
Intricate, untested sky crane airdrop is better than airbags, according to NASA
Call us, maybe
Tyson's book "Space Chronicles: Facing the Ultimate Frontier" is out today
And whether they'll look like E.T.
More than 50 of the most dangerous, disgusting, humiliating and just plain bad professions
Jellyfish invasions, Internet auctions, god particles: Read about the year's biggest science stories before they happen. Bonus: How to decipher geeky jargon and when to buy a DeLorean
Controversial theorist Aubrey de Grey insists that we are within reach of an engineered cure for aging. Are you prepared to live forever?
Will Marc Norman's secret ice recipe set speed skating records in Salt Lake City?