Today, on A Moment of Science, why lips go dry. Let’s start by reviewing the ways in which the surface of our lips is different from the surface of the skin on the rest of our bodies. Basically, our lips are made of the same mucus membrane that coats the inside of our mouths. This […]
Changes in sunlight cause the cat’s brain to signal its hair follicles to respond appropriately. When there’s less sunlight, cats start growing short, fluffy secondary hairs whose job is to provide insulation. And when there’s more sunlight, cats start shedding.