Oxygen has been the most important gas in our search for life among the cosmos thus far. On Earth, we have it in abundance ...

A suspected meteor that fell from the sky over the Cleveland area shook homes and startled residents who heard a boom that some compared to an explosion.

Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself?

It’s 200 feet wide. Perfectly round. Covered in what looks like scorching. Sonar picked it up in 2011, but no one can explain it. The Baltic Sea Anomaly has been called a UFO, an ancient base, or even ...