When people imagine life on other planets, they often picture creatures unlike anything found on Earth. Perhaps they have ...

Over hundreds of thousands of years, humans somehow evolved a type of intelligence found nowhere else in the animal kingdom, at least on Earth. According to the most famous theory describing the ...

Earth is home to some truly unbelievable life forms. From transparent animals and deep-sea nightmares to creatures with blue blood, multiple hearts, and bizarre body shapes, evolution has produced ...

The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home planet.

There’s no data to suggest that aliens exist. However, if we believed they existed and came to Earth, our planet would offer them a somewhat risky buffet. There is liquid water, as well as salts, ...