The unusual specimen raised eyebrows because it appeared capable of causing levitation. An official investigation has not settled the matter, some UFO enthusiasts say.

New SETI research suggests space weather like solar winds could be interfering with alien radio signals, making them harder to detect.

A retired 'UFO general' and a NASA-linked scientist have both vanished in the US, fuelling clashes over whether the case ...

Scientists and NASA officials insist the object is a natural comet, not alien technology. Recent observations found no radio signals from the comet that would suggest it was artificial. The comet made ...