The researchers who scan the skies for radio signals from extraterrestrials are now rethinking their approach.

Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures?

While it sounds like the plot of an Andy Weir novel. If an advanced civilization wanted to tap nearly all the power of its ...

Red dwarfs make up the vast majority of stars in the galaxy. Such ubiquity means they host the majority of rocky exoplanets ...

Looking for molecular evidence of life on other worlds is tricky, but a test based on the reactivity of carbon compounds ...

There is a silence in the night sky that has bothered me for as long as I can remember. ” That observation, attributed to ...

Uri Geller claims aliens are testing Earth's systems after 10,000 US flights disrupted and increased UFO sightings near ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. The TV series Alien:Earth has introduced a number of ...

Ever since physicist Freeman Dyson first proposed the concept in 1960, the "Dyson sphere" has been the holy grail of ...

There is a silence in the night sky that has bothered me for as long as I can remember. ” Richard Feynman’s reflection lingers because it feels personal.

Shaped by a different biology or culture, other intelligent civilisations – if they’re out there – might understand the ...

A UFO row erupts as US congressman claims an intelligence insider warned he could be killed for probing alien secrets, sparking renewed public debate.