Interstellar comet 3I/ATLAS, a visitor older than the Sun, has stunned scientists with a colossal, puzzling X-ray cloud ...

Astronomers are confronting galaxies that look too big and too old for the early universe, hikers and internet sleuths are ...

In late 2026, a spacecraft launched in the 1970s will reach a distance from our planet that once belonged purely to science ...

Water is all around us, yet its surface layer—home to chemical reactions that shape life on Earth—is surprisingly hard to ...