25 Amazing Facts About the Human Body
The human body is an amazing spell of machinery — with a few weird quirks . It’spossibleto brush your teeth too aggressively. Doing so can wear down enamel and make teeth sensitive to hot and cold foods. Goose bumpsevolvedto make our ancestors’ hair stand up, making them appear more threatening to predators. Wisdom teethserve no purpose. They’re left over from hundreds of thousands of years ago. As early humans’ brains grew bigger, it reduced space in the mouth, crowding out this third set of molars....