Mars

Observations by the Mars Express orbiter reveal rapid changes on the Red Planet’s surface from windblown volcanic ash

The U.S. space agency’s Skyfall project calls for sending robotic helicopters to Mars on a nuclear-powered spacecraft before the end of Donald Trump’s presidency

NASA’s nuclear Mars mission, the Iran war’s carbon fallout, the looming climate cost of rebuilding and a hopeful new Lyme vaccine

By plying its ground-penetrating radar in the depths of Mars’s Jezero Crater, this rover has found even older deltas buried beneath those seen on the surface from space

New laboratory studies could shed light on a rock containing potential signs of alien life that’s stranded on Mars

NASA’s MAVEN spacecraft didn’t phone home as expected on December 6

The presence of electrical activity has implications for surface chemistry, future human exploration and habitability on the Red Planet

NASA spent years and billions of dollars collecting Martian samples to bring home. Now they might be stranded

If you pick the right time, our home world and our moon could be easily visible from the Red Planet

The Perseverance rover’s new findings set the stage for bringing Martian samples back to Earth to test whether microbes once inhabited the Red Planet

A common nasal spray shows promise in reducing COVID risk, but vaccine access remains tangled in policy in the U.S.

With no fuel or engines, tiny explorers will surf sun-warmed air alone to explore high in the skies of Earth and Mars