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

["Richard W. Travsky" <rtravsky@uwyo.edu>]

On Sat, 7 Jul 2007, David Marjanovic wrote:
> ----- Original Message ----- From: "Andreas Johansson" <andreasj@gmail.com>
> Sent: Saturday, July 07, 2007 7:44 PM
>
> > > That would be surprising, because the sun gets steadily (though slowly)
> > > brighter with time. It started at 70 % of its total brightness.
> >
> > I believe you mean 70% of *current* brightness.
>
> ARGH! Of course. It will continue to get brighter and brighter. The end of 
> life due to overheating is scheduled for one billion years in the future.

So, how much "dimmer" or "less bright" was the sun during the days of
the dinos?

What effect, if any would this have had on dinosaur evolution? Eyesight,
for example?