Language and radio signals may not matter to aliens. Instead, they might be using patterns to leave a biological fingerprint.

Little-known Danish contactees claim extraterrestrials have been speaking to Europe for centuries, from a mysterious 1600 ...

Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of ...

A major claim in the older media cycle was that NASA removed the book and related materials. Whatever happened during the original wave of reporting, the current reality is clear: NASA now provides an ...