A mysterious metal shard, once thought to be a piece of a UFO that crashed in 1947, has sparked years of wild speculation.

The unusual specimen raised eyebrows because it appeared capable of causing levitation. An official investigation has not ...

One thing about 3I/ATLAS is for certain: It's definitely not from Earth's solar system. But what exactly is the intriguing interstellar object discovered speeding through our cosmic neighborhood? Most ...