Top 10 Animal Moms

Never agree to an eating competition with a female koala, as she only dines on one thing: highly poisonous eucalyptus leaves. Her digestive track can tolerate this otherwise deadly treat thanks to bowels that are packed with special bacteria that detoxify the leaves. Babies — or joeys — aren't born with these superpowers (not to mention a lack of ears, eyes and fur), but Momma Koala comes to the rescue and helps them build up their tolerance by feeding them her own feces. Eesh — guess this puts a whole new spin on threatening to wash someone's mouth out with soap. Once the joeys are born, they spend about six months inside their mother's pouch feeding on milk and forming their missing parts. But this is a mom who won't lose any sleep while nurturing: the female koala gets about 22 hours of shut-eye a day — that's nearly 90 percent of her life spent snoozing!