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.

On Thursday the U.S. president ordered the release of federal files related to UFOs and aliens, although no evidence of extraterrestrials visiting Earth is known to exist ...

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