Change is one of the guaranteed parts of life, and that's particularly true of the human body. As we age, we go through myriad changes, from developing wrinkles and fine lines to weight fluctuations ...

Have you ever wondered why you don’t have thick hair covering your whole body like a dog, cat or gorilla does? Humans aren’t the only mammals with sparse hair. Elephants, rhinos and naked mole rats ...

Until puberty, our bodies look similar regardless of our sex, other than our genitals. When we hit puberty, a barrage of hormones—androgens like testosterone and estrogens like estradiol—reshapes our ...

Assistant Professor of Computational and Systems Biology, University of Pittsburgh Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...