Researchers estimated that the ocean was created by flooding nearly 3.7 billion years ago

Like Earth and our solar system's other planets, Mars formed about 4.5 billion years ago. At the time the ocean apparently existed, it might already have begun its transition away from being a hospitable planet.

A Chinese rover has found new evidence to support the theory that Mars was once home to a vast ocean, including tracing some ancient coastline where water may once have lapped, a study said Thursday.

Astronomers are investigating the possibility of a hidden ninth planet beyond Neptune, which could explain unusual orbital patterns in the Kuiper Belt.

A team of researchers investigated the formation of the massive South Pole-Aitken (SPA) basin, discovering its age by analysing a lunar meteorite found in Algeria in 2005