9. King Louis XVI’s Blood (And His Grandfather’s Head)
The remains of a handkerchief from the French Revolution is soaked with the blood of King Louis XVI, scientists have found. Legend has it that when the king was killed in 1792, people rushed forward and dipped their handkerchiefs in his blood – a story which seems to be true, now that the blood stains have been shown to be his.
DNA testing didn’t prove anything until the handkerchief was compared to a mummified head that probably belonged to King Henry IV, a direct ancestor of King Louis. Both of the finds – the head and the blood – were verified at exactly the same time.