Georges Lemaître, the Catholic priest who proposed what would become the Big Bang theory, created the ultimate cosmic identity crisis. Imagine being so dedicated to your faith that you accidentally give atheists their favorite creation argument. The man literally handed science a universe with a beginning while his religious colleagues were perfectly happy with the eternal, unchanging cosmos. Talk about an own goal! His religious superiors must have been like, "Thanks for the theological headache, Father." The irony is exquisite - he thought he was finding God's fingerprints on the cosmos, but ended up giving Richard Dawkins material for his next book.