How big would a telescope need to be to see Earth’s dinosaurs from 66 million light-years away? Think big—and then think ...

A new paper suggests that BARSOOM may have been alive on the planet, and was killed in the Viking experiments.

For more than six decades, astronomers have listened for possible signals from extraterrestrial civilisations, with no confirmed detection to date. A .

The question of whether aliens exist is not a new one. In science fiction films and books, people have wondered if we’re the only life in this universe and what that can imply for universes beyond ...