|Serration and the Dimetrodon|
The Dimetrodon predator is considered a forerunner to mammals. Scientists believe it to be the first terrestrial vertebrate to have teeth similar to crocodiles. They were the first terrestrial vertebrate to develop cusps, teeth with points. Dr. Robert Reisz from the University of Toronto Mississauga said, "The steak knife configuration of these teeth and the architecture of the skull suggest Dimetrodon was able to grab and rip and dismember large prey."
Putting it into perspective, the Dimetrodon lived at least 50 million years before the first dinosaurs evolved 280 million years ago.
Strangely enough, researchers looked at Dimetrodon across a 25 million year span and found that even though skull shapes did not change, tooth shape did. Serration was benefit 280 million years ago, and still is used today.
The Dimetrodon invented serration, and Joseph Burns put it to good use for modern man.