Scientists propose that a moon base could act as an isolated first line of biological defense against extraterrestrial samples that might be harmful to Earth's biosphere.

Suppose there are signs of extraterrestrial life and we have not yet been able to detect them. What does that mean? In Nature Astronomy, researchers discuss the consequences of these so-called false-negative results.

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.

The Trump administration on Friday released much-anticipated UFO files with images showing evidence of what could be extraterrestrial life. THIS BLOG IS NOW CLOSED Article continues below ADVERTISEMENT Lawmakers have pointed out that Friday’s disclosure represents only the first instalment of the material,

The skepticism and debate around the question of "are we alone in the universe" makes the field of astrobiology more cautious When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The search for ...

Pentagon announces release of files on unidentified aerial phenomena sightings, in what it describes as a transparency push into long-standing questions around alien and extraterrestrial life.

Astrobiologists are raising concerns that humanity’s search for alien life may be limited by the very tools designed to find it.

The scientific community tends to employ ‘confidence of life’ detection scales: a multi-step ‘ladder’ that begins with biosignatures.