The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from ...

Archaeologists have long pictured prehistoric hunters taking down mammoths and other megafauna using the atlatl, a handheld spear-throwing device that uses leverage to achieve greater velocity and ...

A newly spotted interstellar visitor just got an unusually close listen from California scientists — in a search for signs of ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

DNA from ancient humans has been found on a prehistoric cave painting and on cave walls, demonstrating the potential to one ...

NASA's Perseverance rover has uncovered one of the most intriguing clues yet in humanity's search for life beyond Earth.

An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the Sun.

"Measurements of two mudstones show hundreds of organic detections, making this the most robust organic detection in Jezero ...