Astronauts of the future may be radically different from the rest of us in physiology and psychology. So, to what extent ...

For decades, scientists have tried to turn the question of alien life from late-night speculation into something you can ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

Exceptionally preserved fossils from the Ediacaran period challenge what scientists thought was possible in sandstone. In the fossil record, creatures without hard shells or skeletons, such as ...