It's the oldest question on Earth. Where did we come from? Some people may thank a creator from above, but what if the hand that created humanity wasn't divine? What if aliens brought life to Earth?

"They can penetrate metal on satellites, hit circuit boards, and can be carcinogenic if they hit a person in space." ...

There are extraterrestrials among us. They landed four billion years ago when Earth was just forming. And they weren't ...

For the believers and nonbelievers, the Pentagon answered whether UFOs or aliens have ever visited Earth, saying there is no ...

We believe that dusty Martian ice exposures in the mid-latitudes represent the most easily accessible places to search for Martian life today.' ...