Ted-Ed

[Jwanon]

Ted-Ed features thousands of excellent animated videos on science, history and psychology. Wich ones are your favorite?

 

 

 

 

[DancesWithWife]

I don't have any favorites, but I enjoy TED talks in general. TED stands for Technology, Entertainment, and Design. There are several I have watched over and over. Including this one. 

 

[daydream]

Quote

What causes cavities? - Mel Rosenberg

transcript :

Diets high in sugary foods cause an explosion of bacteria called mutans streptococci in our mouths. Like humans, these microorganisms love sugar, using it as a molecular building block and energy source.

 

As they consume it, the bacteria generate byproducts in the form of acids, such as lactic acid. Mutans streptococci are resistant to this acid, but unfortunately, our teeth aren't. While each human tooth is coated in a hardy, protective layer of enamel, it's no match for acid. That degrades the armor over time, leaching away its calcium minerals.