On a hill beneath the Parthenon, I watched Marco Rubio’s much-discussed Oct. 7 speech in the heart of Athens. Although I had lived there before, I had never seen its archaic center so quiet as the ...

Experts believe ancient alien civilizations have been living on mars. See more in this clip from Season 1, Episode 7, ...

This video explores obscure answers to the Fermi Paradox, asking why the universe seems silent if alien civilizations should ...

Confirmation of alien life would answer one enormous question and immediately create dozens more. Humanity’s reaction would ...

Cooperation between Russia and the United States in the field of scientific search for extraterrestrial life and alien ...

Suppose an alien civilization discovers Earth and decides to investigate. Before it chooses a landing site or considers how ...

If ancient alien explorers ever traipsed through Earth's cosmic neighborhood, could it be possible they left behind some ...

The mathematical certainty that 'they' definitely exist in the universeWhen looking up at the night sky, everyone has surely ...

Researchers earlier this month said they used the MeerKAT radio telescope in South Africa to detect radio waves on Beta Pictoris b.

A dead alien infant, an intergalactic royal family and a spaceship crashing into Earth turn director Na Hong-jin’s monster ...

John Brandenburg—a plasma physicist at an aerospace development company—argues that there was an alien civilization on Mars. He cites data from NASA’s Curiosity rover, claiming that xenon levels on ...

Are there intelligent life forms in the universe other than on Earth? This is a grand question that everyone has pondered at ...