You don't need superpowers to be a hero, and these seven prove it by being better heroes than everyone else as completely ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...

Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned ...