The answer: Humans. Though frogs are a step up. First, the class cut open an earthworm, then a chicken wing. In high school the animals get even bigger. Rats, cats, and fetal pigs all give insight ...

(CBS/AP) - Drop that scalpel! A Southern California high school has banned frog dissections in biology classrooms, becoming the first U.S. school to take up animal welfare supporters' offer of ...