As the four-person crew of Artemis II prepares to launch on a historic mission around the moon as soon as February, some experts are worried about the spacecraft’s heat shield.

Old satellites and other space junk fall toward Earth every day, and the shock waves they create could be used to track their trajectories, according to new research.

Horses can detect fear in humans by smell, becoming more likely to startle and more wary of people who are scared, a new study has found.

Images of plants painted on pottery made up to 8,000 years ago may be the earliest example of humans’ mathematical thought, a study has found.

Tyrannosaurus rex lived longer and took more time to reach its maximum size than previously thought, according to a new study.