The Ten Plagues of Egypt: myth, divine warning or something else?
The cause of the fall of the Roman Empire remains highly controversial.
Questions remain about how the Inca Empire was toppled by the Spanish.
Despite his untimely death at 19, King Tutankhamun left an enduring legacy.
The mystery of Noah's Ark has fascinated explorers for years.
The legend of El Dorado once sparked many quests for its hidden treasures.
Mary Magdalene remains one of the Bible's most controversial figures.