When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes. So what causes cavities, and how can we avoid them? Mel Rosenberg takes us inside our teeth to find out. [Directed by Andrew Foerster, narrated by Addison Anderson, music by Devin Polaski].
一队考古学家发现了距今约15000 年的人类遗骸，并有了一个有趣的发现：这些远古人类的牙齿上布满了蛀洞。那么，蛀牙究竟是如何形成的？我们又该如何预防？梅尔・罗森伯格（Mel Rosenberg）将带我们深入牙齿内部一探究竟。
