Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

Machine learning is quietly rewriting the rules of the cosmic hunt for company. Instead of waiting to recognize familiar fingerprints of biology, researchers are training algorithms to spot the deeper ...

Every known living thing on Earth needs water. The life-giving liquid makes up around 60 percent of each human’s body weight, ...

We may not have found any definitive proof of extraterrestrial life just yet, despite plenty of hope among scientists. But if we were to ever come to an answer in the form of alien biology or ...

Add Yahoo as a preferred source to see more of our stories on Google. A 13-atom molecule containing sulfur (seen in this illustration) was discovered in interstellar space for the first time. - ...

The unusual specimen raised eyebrows because it appeared capable of causing levitation. An official investigation has not settled the matter, some UFO enthusiasts say.

President Trump on Thursday directed his administration to release files on UFOs and any "alien and extraterrestrial life," an issue that has drawn decades of public fascination — and spawned more ...

(CNN) — Scientists have discovered the largest organic molecule containing sulfur — a key ingredient for life — ever identified in interstellar space. The researchers call the discovery a “missing ...