John Morrison
MemberCompsognathusAug-20-2014 10:03 PMI would say anywere from 20-40 years for a large theropod. Small theropods probably had a wide variation in lifespan similar to modern birds.
Sauropods, at least the large ones, probably lived from 70-80 years old based on growth ring studies.
As for Ceratopsians there is not much info on lifespan for them at this point.
Ian Malcolm: No I'm, I'm simply saying that life - uhhh - finds a way.
Rex Fan 684
MemberCompsognathusAug-21-2014 7:09 AMThe oldest T.rex was Sue at 28 years old. The biggest theropods therefore lived in the 25-35 year range, which isn't that short.
Tyrant king
MemberCompsognathusAug-21-2014 7:22 AMI just thought it would be like 50 or 60
but, i guess they lived fast and died young.
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