If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth. Eerie ...

A strange extinction event followed by reports of a UFO sighting. Is this real evidence of alien abduction or just a mystery ...

A study by scientists at Penn State and NASA shows that intact biomolecules from dormant microbes break down much more slowly ...

In September, NASA announced the discovery of a possible sign of life, known as a potential biosignature, on Mars. The Perseverance rover, which has been exploring a dried-up lakebed for years, found ...