A primitive ocean on Mars held more water than Earth’s Arctic Ocean, and covered a greater portion of the planet’s surface than the Atlantic Ocean does on Earth, according to new results published ...

For decades, scientists have debated the mystery ofMars’ lost water. Now, a new discovery has provided some of the strongest ...

Mars – dusty, dry, and desert-clad – was once so rich in water it had not just lakes, but oceans, according to a new study.

Researchers just discovered evidence to suggest that Mars was once home to oceans and sandy beaches on the red planet, according to data published by the Proceedings of the National Academy of ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Mars may have once ...

A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly half the planet. The blue areas show the depth of the ocean filled to the shoreline level of the ancient, ...

Deep beneath the surface of Mars lies a large reservoir of liquid water, according to seismometer data from NASA’s retired InSight lander. The findings, published Aug. 12 in Proceedings of the ...

Illustration of the planet Mars covered in water in the past, when its atmosphere was thicker and warmer. Now scientists may have found an unground reservoir. Is there water on Mars? Scientists using ...

A study using radar data from China's now-dead Zhurong rover finds strong evidence that Mars had a stable ocean in the ancient past. Credit: Victor Habbick Visions / Science Photo Library / Getty ...

Scientists have discovered the perfect vacation spot: it's sun-soaked, has sandy beaches, sports gentle waves lapping rhythmically on the shore. But hold off on grabbing the sun lotion, because ...