An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

Planets orbiting stars beyond the solar system come in all shapes and sizes but mostly fit into a few categories: large and hot gas giants, super-Earths that are slightly larger than our planet, ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. The Milky Way galaxy has more than 400 billion stars in it. Over the last few decades, ...

Hidden deep within southern Siberia lies one of the most mysterious places on Earth. At first glance, Lake Baikal looks like ...

Astronomers have identified a clue hidden in the light of certain stars that's already led them to discover seven new alien planets, with more expected to come. To be clear, these alien planets likely ...

A nutrition scientist applies metabolism, biology and food science to one of science fiction's oldest questions.

There’s no data to suggest that aliens exist. However, if we believed they existed and came to Earth, our planet would offer ...