First dentistry was painless.Then bicycles were chainless,Carriages were horseless,And many laws enforceless.Next cookery was fireless,Telegraphy was wireless,Cigars were nicotineless,And coffee caffeineless.Soon oranges were seedless,The putting green was weedless,The college boy was hatless,The proper diet fatless.New...

I’m English. Our dentistry is not world famous.

A biologist with a history of tooth decay invents a symbiotic microbe which lives in the human mouth and feeds by cleaning our teeth. It secreted calcium, which is poisonous to it, controlling its growth...