Talk about a bizarre feature of the human body: If you happened to swallow a razor blade, your stomach acid would dissolve it ...

The reentry of Artemis II will bring a new round of incredible feats. The crew will challenge the record for the fastest humans have ever traveled.

The natural world rarely behaves the way we expect. Physics bends intuition. Biology ignores neat categories. Space refuses to be reasonable. Some facts sound like they were invented for a science ...