Teeth I see you want the teeth section better explained The idea is that tetrapods that grows slowly i e 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 pre school age can attest to it is also a lot of bother try eating an apple without your front teeth Thus for the fast living high energy demanding life of insectivorous mammals tooth replacement is kept to an minimum i e 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