Day 19 of #30for30for30 contest! Answer this trivia question in the comments for a chance to win one of our giveaways:
TRUE OR FALSE: Tooth enamel is the hardest substance in the human body.
Day 19 of #30for30for30 contest! Answer this trivia question in the comments for a chance to win one of our giveaways:
TRUE OR FALSE: Tooth enamel is the hardest substance in the human body.