Since the 1950s, humanity has been searching for extraterrestrial life with increasingly sophisticated tools. But after decades of space probes, meteorite analysis, radio telescopes, and UFO ...

One of the most elegant theories about the origins of life on our planet is that it was kick-started by a delivery from outer ...

Two new peer-reviewed papers claim thousands of unexplained light flashes in vintage Palomar telescope images show statistical ties to nuclear tests and UFO reports. Not everyone agrees with the paper ...

When astronomers search for planets that could host liquid water on their surface, they start by looking at a star's habitable zone. Water is a key ingredient for life, and on a planet too close to ...