Teeth  I see you want the teeth section better explained  The idea is that tetrapods that grows slowly ie reptiles continue to grow in maturity Both the steadily increasing size of the jaws and the wear and tear imposed by a long life dictate continued change of teeth Mammalian teeth being complex replacing teeth requires quite a bit of resources and as anyone having children of preschool age can attest to it is also a lot of bother try eating an apple without your front teeth Thus for the fastliving high energy demanding life of insectivorous mammals tooth replacement is kept to an minimum ie two setts a trait retained in their descendants How do you propose going about explaining it without making it a disproportionally large part of the article Or is it so important it should be a large part