Remember looking at your hair in the mirror this morning? There is a lot that you don't know about something that is so familiar. Although hair is dead, it keeps on growing. In fact, continuously growing hair on our head is a uniquely human characteristic. All mammals have fur, but fur is not quite the same as hair. Do you know what hair is made of? Or how fast it grows? Or to what length it grows? Women and men have straight, wavy or curly hair on their head, but what gives hair these different qualities? Most of the people in the world have black or very dark brown hair. So, where did...

Why do you wear clothes? Consider this: no other animal wears clothes and no one is born wearing clothes. So why and when did we start to wear clothes? Clothing was an early invention on our way to becoming human. And what a stroke of ingenuity. Wearing clothes empowered us to conquer the world. What do clothes do for us? Certainly they protect us from bad weather and hazardous conditions. They keep us comfortable and safe. In their most basic usages, clothes are movable sanctuaries for the body. But there is so much more. Clothes are your daily form of self-expression. They tell people who...