Visit Mars as it might have looked billions of years ago. Not frozen and dry, but wet, warm, and alive with flowing water. Across vast highlands near the Martian equator, deep river-like valleys snake through the surface. These valleys don’t just suggest ...

Mars may be drenched beneath its surface, with enough water hiding in the cracks of underground rocks to form a global ocean, new research suggests.The findings released Monday are based on seismic measurements from NASA’s Mars InSight lander, which ...

A new study suggests Mars could help scientists understand how alien worlds evolve by showing how a once warmer, wetter planet lost its atmosphere and crossed the edge of habitability.

Most planetary scientists agree that Mars’ extreme conditions would be uninhabitable to life as we know it. New research, however, suggests that we might be underestimating the hardiness of lichens. Researchers in Poland have revealed that some lichen ...

Mars has captivated scientists and the public alike for centuries. One of the biggest reasons is the planet’s reddish hue, earning the fourth rock from the sun one of its most popular nicknames — the “Red Planet.” But what exactly gives the planet ...

NASA said the crystals' shape and structure reflect the climate's conditions, including temperature and water pressure.

Landing humans on Mars could teach us whether life ever existed beyond Earth, how planets change over time, and how humans can live on other worlds. By studying Mars up close, astronauts could answer some of the biggest questions in science,