In recent years, black holes have transitioned from being exotic theoretical objects to well-observed phenomena in the universe. The first direct evidence came from the detection of ripples in ...

White holes are mathematically possible, according to general relativity. But does that mean they're actually out there?

Among the many concepts for human interstellar travel, one of the more provocative is an offspring of Einstein’s theories, the bright twin of the black hole, the white hole. The existence of black ...

Some scientists think black holes are back doors to other universes. If true, this theory could explain how all of the matter in our universe was created.