53. "When it comes to the brain, size matters...

...The stegosaurus brain was about the size of a walnut. The adult human brain weighs 1,300 to 1,400 grams. The average cat brain weighs only about 30 grams. This is why human curiosity helped invent space travel and cures for cancer."

From "Making a Good Brain Great" by Daniel G. Amen, M.D., Three Rivers Press, New York