January 16, 2019

Why do some people go gray?

Special cells in your follicles – your body’s hair-producing factories – produce melanin, the pigment responsible for your hair’s color. These cells begin to die as […]
January 16, 2019

Why do some people get wrinkles?

Once you reach adulthood, your skin stops growing. It loses its elasticity, taking a little longer to spring back into shape when you laugh or furrow […]
January 17, 2019

Why is earth special?

Earth is a special spot in the solar system for so many reasons – its sprawling continents, its blue seas, and its nearly limitless variety of […]
January 18, 2019

Why is the earth round?

Actually, it’s not perfectly round. It’s an “oblate spheroid,’’ a sphere that’s slightly wider at the Equator than at the Poles. Gravity squashed Earth and the […]