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Re: The Return of The Thagomizer... :-)



Might want to take a look at the Hertzsprung-Russell diagram.
JimC

----- Original Message ----- From: "Dann Pigdon" <dannj@alphalink.com.au>
To: <dinosaur@usc.edu>
Sent: Thursday, July 12, 2007 11:53 PM
Subject: Re: The Return of The Thagomizer... :-)



If my thumbnail calculations are correct, then the sun has only increased (relative to it's initial brightness) by a further 0.58% since the end of the Cretaceous. Dinosaurs probably lived through less than a 2% increase in brightness due to increased solar output during their entire reign on earth.