As we all learned in health class, human beings have 32 teeth. Twenty-eight of them come in before puberty, but the last four teeth, our “third molars,” usually come in during our late teens or early 20′s, when we’re presumably older and wiser, hence their nickname, wisdom teeth. Lean more on this Moment of Science.
Learn how to grow your own dentures on this Moment of Science.
When dinosaurs ruled the earth, the Tyrannosaurus Rex ate just about anything it wanted. But did that include other T. Rex?
Does sugar really cause cavities? Find out on A Moment of Science.
After elephants, Nile hippos are the largest land animals, weighing up to eight or nine thousand pounds.But, unlike elephants, hippos spend their days in the water, which might make it seem silly to ask: can hippos swim?
Most tooth decay is caused by a strain of bacteria called Streptococcus mutans. It consumes sugar on the surface of the teeth and converts it into lactic acid, which is what eats away tooth enamel, causing decay.
Early stone tools, like knives and scrapers, are easy for anthropologists to learn about because these items are still around. Even after two million years, a chipped stone tool is still going to be there when you dig it up.
Honeybees make propolis by collecting the secretions of trees and other plants where they live; thus the make-up of propolis varies depending on the plant life around. Researchers have found the propolis of Brazilian honeybees to be particularly potent when it comes to protecting teeth.
Many of us have heard that if you soak a tooth in soda for a few days it will begin to soften. Well, it isn’t true, but it doesn’t mean you can drink all the soda you want without it causing tooth problems. While soda contains citric and phosphoric acids, so do plenty of other foods and beverages.
The zipper is a relatively modern invention, yet it uses two ancient tools: the wedge and hook. A wedge is an object with a slanted surface that exerts force on other objects in order to move them up or to the side.