Having considered more than 1,000 cases, this analyst of unidentified anomalous phenomena has honed a rational process for ...

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

Avi Loeb, a cosmologist who studied black holes and served as head of Harvard’s astronomy department until 2020, will lead a ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...