10 Unsolved Historical Mysteries That Still Confuse Experts

5. The Phaistos Disc

This clay disc, found in Crete in 1908, is about 4,000 years old. It has strange symbols stamped on it in a spiral pattern.

Experts have tried for years to read it, but the language doesn’t match anything known. Was it a prayer, a story, or a calendar? The meaning of the Phaistos Disc remains a mystery.