Millions of years before the asteroid impact that ended the reign of the dinosaurs, mammals were already beginning to shift ...

A cache of 1.5 million-year-old bone tools uncovered in Tanzania suggest ancient human ancestors were capable of critical thinking and advanced craftsmanship.

either by directly laying down bone tissue into connective tissue or forming it from cartilage, such as during growth in length of long bones. Endochondral ossification is hard to recapitulate ...