Unexplained Mystery #4: The Belmez Faces

In 1971, in the small Spanish village of Belmez, Maria Pereira claimed a human face spontaneously appeared on her cement kitchen floor. It wasn't long before she destroyed the floor and replaced it - and a new face promptly appeared.

More and more faces continued to appear on the floor of Maria Pereira's kitchen, attracting thousands of visitors every day. Some were male, some female, some large, and some small. In time, she discovered that the house, built around 1830, apparently stood above a graveyard used by the Romans, Spanish Muslims and then Medieval Christians.

But did Maria Pereira just paint the faces herself?

If so, she never benefited financially from all the attention. She lived a simple life in that same house and eventually died in 2004.

Paranormal fans suggest that the faces were manifested on the floor by telekinesis. This notion was based on the absurdly unscientific claim that the expressions on their faces used to change with the mood of Maria Pereira.

Finally, modern technology has saved the day for this unexplained mystery.

Scientists have found it possible to analyze the molecular changes in the whitewash and prove that some fakery was involved.