Earth. Wiping out the dinosaurs and 75% of the other animals on Earth. Devastating yes, but this was millions of years ago.

Imagine never being able to dream of landing on Mars or traveling to Saturn. Not because it's impossible to get there, but ...

The gleaming moon hanging in our sky has been the subject of countless songs, poems, myths, and legends. But in reality, what would happen if the Earth suddenly lost the moon? Quite a few things, ...

Suppose you could speed up Earth’s rotation so that a day was only half as long? What would happen? Well, for starters we’d have to make new clocks that only have hours 1 to 6 for am and pm. If you ...

Illustration of a hypothetical planet covered in water. Credit: NASA/JPL-Caltech. April 7, 2025, Mountain View, CA -- What if we spend decades building advanced telescopes to search for life on other ...

Searching for technosignatures—signs of technology on a planet that we can see from afar—remains a difficult task. There are ...

(CNN) — The asteroid known as 2024 YR4 is out of sight yet still very much on scientists’ minds. The building-sized object, which initially appeared to be on a potential collision course with Earth, ...

More objects are being launched into space than ever, and most are headed for low Earth orbit. This region of space has become increasingly crowded with launches from SpaceX and others that have ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...