The Famous Left-handed brains can often handle music easily, but have trouble with language. Benjamin Franklin signed the Declaration of Independence and the Constitution with his left hand. Ronald Regan was born left-handed, but he was forced to switch to his right hand. The only astronaut to fly in all three space programs, Mercury, Gemini and Apollo, was left-handed Wally Schirra. When painting the Sistine Chapel, Michelangelo used both hands to paint.
Lobsters are also subject to handedness.
If the left claw is bigger than the right, it's left handed, and vice versa. Mice and rats are equally divided into lefties and righties, regardless of breeding. However, they will easily switch paws if it makes obtaining food easier. The left tusks of Arctic whales can grow to be 9 feet long and spiral in a counter clockwise direction. In zoo research, apelike animals, like lemurs and galagos, are primarily left-handed.