The green ring that is formed around the yolk of eggs that have been cooked too long is formed by the chemical reaction from the iron in the yolk and the sulphur in the white part of the egg. | Cleopatra married two of her brothers. | On average men spend 51 minutes a day grooming themselves. | Karoke means "empty orchestra" in Japanese. | A perfect SAT score is 1600 combined. Bill Gates scored 1590 on his SAT. Paul Allen, Bill's partner in Microsoft, scored a perfect 1600. Bill Cosby scored less than 500 combined.