Lindsey and Tim Pierce used a handful of embryos donated in 1994 in pursuit of having a child after fighting infertility for ...

Teeth and bones are both hard, white and heavy with calcium, but that doesn't make them one and the same. From the way they ...

Long before evolution equipped them with the right teeth, early humans began eating tough grasses and starchy underground ...

Legendary Queen frontman Freddie Mercury believed one thing gave him such a unique singing voice, and fans agree.