There was a lot of unexplained phenomena going on in this place.

Part of the difficulty is that there are still unexplained acoustic phenomena.

The official story is that people, buildings and objects vanished because of an unknown, unexplained natural phenomenon.

There are many different stories of unexplained phenomena that leave people highly spooked over a simple tree.

Very soon, strange and unexplained phenomena are observed in the house.

She has a huge obsession with unexplained phenomena and occultism.

There is often a blurred line between myth, religion and unexplained phenomenon.

Charles Fort had a lot of those cases in his books of unexplained phenomena.

Theory is usually created by analogy between unexplained and familiar phenomena.

Their mission being the investigation and containment of unexplained phenomena from around the world.