Pregnancies do not weaken a woman's skeleton. Breastfeeding, however, can reduce bone density considerably. These are ...

Novel and published data confirm that cartilaginous fishes (chondrichthyans) from many different clades share interesting skeletal features that are similar to bone, but some 'classic' chondrichthyan ...

Paleontologists in Argentina have uncovered a perfectly preserved dinosaur egg believed to be over 70 million years old, ...