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>Date: Tue, 2 Sep 1997 21:35:59 -0500
>From:brucet@mindspring.com (bruce thompson)
>Subject:Re: LIFE SPAN/T-REX
>>Large reptiles that live on predator and disease free dinosaurs can live 150
>>to perhaps 200 yrs....
>>Tyrannosaurs probably had to grow rapidly, at a rate approaching, equaling or
>>even exceeding elephants, in order to grow quickly enough to reach sexual
>>maturity at a substantial fraction of adult mass in 10 to 20 years.
>        Is there any evidence as to whether tyrannosaurs grew throughout
>their lives?  And I certainly don't want to restart the
>warm-blooded--cold-blooded thread again, but would the manner of their
>metabolism have an effect on their natural lifespans?


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