Alien civilizations may have left traces. We just may not have been looking in the right place.

Instead of searching the skies for radio signals, scientists suggest the first evidence of an extinct alien civilisation ...

Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...

A new line of research proposes that the first clear signs of extraterrestrial intelligence may not come from distant stars, ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new paper.

Two scientists want NASA to build a quarantine lab for alien germs on the Moon, rather than on Earth. The pair, ...

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

Researchers propose turning a future NASA moon base into a quarantine station that would screen space samples before they ever reach Earth.

Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

A biologist specializing in invasive species has partnered with a former Pentagon strategist in pushing NASA to construct a ...