Between biosignatures and technosignatures lie noosignatures, and some scientists think they could help us find alien life ...

Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House scientific advisory council on UFOs.

Forget UFOs and alien abductions, here's how scientists are really looking for life on other worlds. Unusual mudstones found on the Red Planet are potentially associated with ancient Martian microbes.

Could alien life exist closer than we think - perhaps right next door? The team investigate evidence that suggests the search ...