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.
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.
If you chew gum with sugar in it, you need to chew for twenty minutes or more in order to produce enough saliva to wash away a significant amount of the sugar residue. Even then, it’s a good idea to brush your teeth afterward.
If you are grinding your teeth you could be wearing the enamel down, as well as causing damage to your jaw. When we’re asleep, we’re capable of grinding our teeth six times as hard as we might in the day. That kind of pressure can do a lot of damage.
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.