Two competing forces may explain Mars's vanishing oceans: solar wind erosion that stripped away its atmosphere, and vast underground reservoirs that swallowed what remained.
A triumph in orbit collided with a threat to the very science that built NASA's reputation, exposing a deeper crisis beneath the headlines.
Seeing Earth whole from space triggers a profound psychological transformation that astronauts struggle to put into words—and scientists are only now beginning to understand.
The galaxy is ruled by a type of world we've never seen up close—and it's forcing us to rethink how planetary systems form.
The deep ocean remains so alien that we know Mars better—and the creatures we've discovered in its lightless depths have fundamentally changed what we thought life required to survive.
A Hubble-sized mirror with a hundred times wider view will hunt for the universe's darkest secrets and worlds beyond our solar system.
The universe's speed limit isn't just hard to reach—it's fundamentally impossible for anything with mass, but physicists keep searching for loopholes anyway.
The trillion-dollar asteroid fortune collapses the moment you do the math on bringing platinum home.
The thin Martian atmosphere creates radical temperature swings across impossibly short distances, making the planet's climate fundamentally alien to anything on Earth.
Jupiter's largest moon is so vast and geologically complex that planetary scientists struggle to explain why it merely orbits rather than commands its own place in the Solar System.
Saturn's moon offers a shortcut to one of space exploration's hardest problems: scientists may finally sample an alien ocean without drilling through miles of ice.
The dream of making Mars habitable with current technology isn't just difficult—it's physically impossible, forcing any settlement into permanent underground bunkers.
For decades, scientists knew what killed the dinosaurs—now rare metals in ancient debris reveal where the asteroid came from, and the answer rewrites our understanding of the solar system's violent past.
To survive on Titan, you'd need a heated suit and oxygen, but not the pressurized shell that would crush you on Venus or suffocate you on Mars—a distinction that fundamentally reshapes how we imagine life beyond Earth.
Titan's vast methane rivers vanish into seas without leaving the telltale deltas that mark nearly every river on Earth—a geologic puzzle that challenges our understanding of how flowing liquids shape alien worlds.
Our best models for how black holes grow may be fundamentally incomplete—the early universe contains behemoths that shouldn't exist yet.
