It is often suggested that this may have already happened: alien technosignatures may have reached Earth during the past six decades but have gone unnoticed. If that is true, it suggests that more ...

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?

The curious minds at What If imagine aliens visiting Earth a million years in the future, exploring what remnants of humanity and civilization they might encounter. Study of 27.8M Americans may have ...

You don't need a rocket ship to visit another world. Right here on planet Earth, there are bizarre landscapes that defy expectations. They're real places you could visit with nothing more than a plane ...

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