Gas might keep the dwarf planet's subsurface ocean from freezing.
His favorite astronaut, his most beloved fictional space explorer, and the discoveries that would have changed the plot of 'The Martian.'
Sorry, no aliens—yet.
Buried under an ice cap, the water is so deep scientists couldn't probe to the bottom.
Heat and drills will help us probe for alien microbes
Confirming hints picked up by the Hubble just a few years ago.
But Blue Origin has a lot of work to do before its lander can touch down.
Capturing a meteor shower takes serious photographic skill, but the results are worth the effort.
Can we, uh, not give up on this planet quite yet?
Saturn's moon is shockingly Earth-like, so NASA is sending a drone.
Time for a new plan.
The ocean-filled moon might hold the life we've long searched for in space. And scientists have one shot to reach it.
Launching a big rocket? You'll need to get wet.
The Dawn spacecraft arrives at Ceres this March, and it could be the most surprising space mission in decades
Jupiter's moon is the best candidate for finding extraterrestrial life; here's how we're going to get there
A very special delivery
In the December 1980 issue of Popular Science, a 38-year-old theoretical physicist answers the ultimate question about the universe.
We think you can, Opportunity.
High impact research.
Can gardens help astronauts go farther?
Shamu dreams of Europa.
Deep Sea Meets Deep Space
An old theory gets a new assist from the sun.