Could alien signals have already reached Earth undetected?

Astronomers have searched the skies for signs of extraterrestrial technology for decades. These searchers since 1960 have ...

If alien signals have already reached Earth, why haven't we seen them?

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp ...
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Why scientists think aliens probably do exist (but not like in the movies)

The odds are that life is out there – but rather than little green men, it may look more like hydrothermal vent tubeworms ...
Knowridge Science Report

If aliens already called, why didn’t we hear?

For more than 60 years, scientists have been scanning the skies for signs of intelligent life beyond Earth. Using powerful telescopes, they have searched for unusual radio signals, brief laser flashes ...
The Debrief

The Search for Alien Tech Reveals a Pulsar at the Heart of the Galaxy—And It Could Help Test Einstein’s Theory of Gravity

Researchers looking for signs of extraterrestrial life instead stumbled upon a pulsar at the center of the Milky Way galaxy.