| 1 | Calcium is beneficial to our bones. | |
| 2 | Nothing had yet evolved with teeth or even bones. | |
| 3 | Strong bones depend on a variety of diet and lifestyle factors. | |
| 4 | This force stimulates the bone to maintain or even build new tissue. | |
| 5 | Excavations-have found one small tomb holding the skeleton of a little girl. |
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