Physicist Brian Cox has confirmed that Comet 3I/ATLAS — an interstellar traveller predating our Sun — is a natural object composed of ice, dust, and carbon dioxide, and not of extraterrestrial design.

Astronomers are puzzled by new data showing that 3I/ATLAS, the mysterious interstellar object, may have slowed down unexpectedly during its journey through space. After NASA’s instruments went silent, ...

Prince William will attend the Earthshot Prize in Rio next week, as Brazil reels from a police raid that left at least 132 ...