Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

When scientists search for alien life, they usually look for planets that resemble Earth. The reasoning is simple. Every known living thing depends on liquid water, carbon based chemistry, and the ...

New research has found that a specific form of life may be able to live on one of Saturn’s moons, Enceladus. Enceladus is a ...

Scientists have proposed a lunar quarantine facility to screen extraterrestrial samples before they reach Earth, citing the risk of unknown biological contamination. By NASA - Public Domain, via ...