In a recent episode of the SciShow series Quick Questions, host Hank Green explains why we start off with a deciduous set of 20 baby teeth as a toddler. A toddler’s small jaws just can’t handle the large and permanent set of 32 adult teeth.
What’s up with baby teeth? Do other animals have them, and what are they good for — other than squeezing money out of the tooth fairy? We have the answers!