Discover why astronomers believe the interstellar comet 3I/ATLAS could be 14 billion years old and what Harvard's Avi Loeb ...

When 3I/ATLAS swept past the sun in late October 2025, it became only the third confirmed visitor from interstellar space ...

This is not the first time that a comet is accusing it of being a spy. However, 3I/ATLAS, which was introduced on July 1, ...

Pluribus is a coldly intelligent character study about individualism and the cost of remaining human when the apocalypse arrives.

New images of interstellar object 3I/ATLAS debunk 'cloaking' myths. Astronomers reveal a thinning coma as the visitor heads ...

From signs of life on Mars to an interstellar visitor and weakening dark energy, 2025 reshaped space science, raising the ...

I/ATLAS was first discovered on July 1, 2025, it has garnered much attention, including speculation, hopes and fears that it ...

Harvard's Avi Loeb argues 3I/ATLAS shows signs of alien technology, from its 0.2% probability flight path to bizarre metal ...

With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...

"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.