Earth’s deep past leaves plenty of unanswered questions. None currently proves an alien visit, but scientists know the ...

The discovery of extraterrestrial material inside an ancient crater on Earth is raising new questions about how life may have first emerged on our planet. South Korean researchers studying the ...

Earth already contains organisms that survive conditions humans could never endure. Alien life, if it exists, may force ...

Alien life may not need the kind of home humans instinctively search for. Some of the strangest possibilities begin once ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

Science fiction suggests that life on other planets, if it exists, is likely far more advanced than life on Earth. A recent study suggests otherwise. This new study, led by Chris Doughty, a professor ...