Long before the asteroid hit Earth and wiped out the dinosaurs, many mammals had already started living on the ground, ...

The tools were made from large fragments of these animals’ long bones, collected usually while fresh — both from defleshed bones and fresh carcasses — using a particular sequence of several ...

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

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 ...