An old theory gets a new assist from the sun.
Oxygen-breathing critters might be more plausible than we thought.
The upper atmosphere of Venus is surprisingly similar Earth.
Time for a new plan.
Also in space: A neighborhood of black holes, a new (and old) reason to study Venus' clouds, and the end of the Lunar XPrize.
It's time to return to our hellish neighbor.
The ExoMars orbiter is going strong, and slowing down.
Seeking a distant pale blue dot
Popular Science goes way back
Torpedo technology from the 1920s could fuel future spaceflight
Hot new evidence
And it's still not Pluto
Here's what it would take to survive this particular doomsday prophecy
Welcome to Ceres
The Dawn spacecraft arrives at Ceres this March, and it could be the most surprising space mission in decades
The company's open source AI software is an armchair explorer's dream.
A curved line marked the planet's surface for four days
Pluto is just the beginning
Even in space, bureaucracy exists.
This year's missions to the outer solar system are set to shake up the planetary family tree
It could be the largest moon we've ever seen