Today, we know of Mars as a cold, dry desert, with patches of subterranean ice and ice caps at its poles. Billions of years ago, however, liquid water flowed freely across the planet. And, while NASA's various Mars rovers have uncovered signs that such water once existed on Mars,

Using data from a Mars rover, a team of scientists have identified hidden layers of rock under the Red Planet's surface that strongly indicate the presence of an ancient ocean. The findings suggest that Mars may once have been home to sun-soaked, sandy beaches like those we enjoy on holiday.

Ground-penetrating radar data obtained by China's Zhurong rover has revealed buried beneath the Martian surface evidence of what look like sandy beaches from the shoreline of a large ocean that may have existed long ago on the northern plains of Mars.

Data from China's Zhurong rover on Mars suggests an ancient ocean and strengthens evidence that the planet was once warm, wet, and habitable.

Mars – dusty, dry, and desert-clad – was once so rich in water it had not just lakes, but oceans, according to a new study. Observations using ground-penetrating radar have revealed underground features consistent with beaches on the red planet,