Being able to spot the Earth, let alone any signs of life on our planet, would require an enormous telescope from 66 million ...

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp ...

Scientists might have just found Earth's icy, distant cousin a few hundred million light-years away. HD 137010 b is one of ...

The curious minds at What If explore what would happen if aliens were secretly living inside Earth, revealing underground ...

Human intelligence wasn’t a cosmic evolutionary fluke, some scientists say. The case against cosmic loneliness is growing.

Documents might help scientists shed light on unexplained phenomena and government secrets, experts said.

The Fermi Paradox asks a simple question: if alien civilizations should be common, where is everybody? The Zoo Hypothesis ...

Donald Trump’s out-of-left-field announcement that he’s ordered the release of government files on alien life has set off a ...

From waterfalls that seem to disappear into nowhere to blood-colored water, these places are shrouded in mystery—even if science can explain most of them.