Here, on Earth, there’s a lot of water on the surface in rivers, lakes, and oceans. Other planets, that don’t have an atmosphere, may have trouble holding water on the surface. Take Mars ...

Earth received water toward the final stages of its formation. This reshapes understanding of the conditions needed for life.

Alien lifeforms living in oceans on other planets could remain hidden from spacecraft, suggests new research. Searching for ...

Because liquid water can only exist at a comparatively ... The search for life on other planets is not yet done surprising us. Receive a weekly dose of discovery in your inbox!

Space probes can explore other planets without needing astronauts ... on Mars that may have been created by flowing water. Landers touch down on planets and take a soil sample, which is then ...

Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of monikers. Every other solar system ...