Learn how our bone density has changed over human history as our lifestyles have become less physically demanding.
8/28/17 | 4:54
7/18/17 | 3:46
5/9/17 | 3:53
4/12/17 | 5:51
5/23/17 | 4:56
10/10/16 | 5:46
2/15/17 | 4:05