Last Problem:
What does a typical shark do more than 30,000 times during its life?
Answer:
Lose a tooth. Some sharks have up to eight rows of teeth. Since shark’s teeth aren’t attached to their jaws, they can easily fall out during dinner. As one row of teeth is lost, a new row pops up from behind to replace it.
Today’s Problem:
Snakes are cold-blooded. What does this mean?