Messed Up Teeth - Why Are Human Teeth So Messed Up? - SAPIENS
https://www.sapiens.org/body/human-teeth-evolution/
We rarely consider just how amazing our teeth are. They break food without themselves being broken, up to millions of times over the course of a lifetime; and they do it built from the very same raw materials as the foods they are breaking. Nature is truly an inspired engineer.
Messed Up Teeth - Why Are Human Teeth So Messed Up? - SAPIENS
https://www.sapiens.org/body/human-teeth-evolution
We rarely consider just how amazing our teeth are. They break food without themselves being broken, up to millions of times over the course of a lifetime; and they do it built from the very same raw materials as the foods they are breaking. Nature is truly an inspired engineer.
Mountain beavers evolved thicker teeth to eat volcanoes [Evolution]
http://feeds.gawker.com/~r/io9/vip/~3/ZiA_zkycDhE/mountain-beavers-evolved-thicker-teeth-to-eat-volcanoes
StateMaster - Statistics Oral health Loss of natural teeth by state
http://www.statemaster.com/graph/hea_ora_hea_los_of_nat_tee-health-oral-loss-natural-teeth
"DEFINITION: Adults aged 65+ who have had all their natural teeth extracted."