When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that ...

A research team has developed a new approach to detecting life beyond Earth that does not rely on identifying specific ...

Scientists in a recent breakthrough have introduced a new strategy to detect extraterrestrial life, marking a novel shift ...

Trump has ordered a UFO data release. But if aliens exist, what would they think of us? - For generations, human beings have ...

(cokada/iStock/Getty Images) Alien megastructures built to harvest stellar energy or alter the orbits of stars may be ...

Comet 41P/Tuttle-Giacobini-Kresak has begun acting a little unusually, but there are likely natural explanations before we go ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.