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Re: Length of Day during Dino times?


I've been looking into this and other astronomical possibilities during the
Mesozoic. It's a complex problem, involving galactic rotation and
interactions, lunar regression rates, solar brightening, tidal effects,
continental positions, stellar evolution, and a host of other planetary and
cosmic variables. None of these factors is known with certainty, but your
point is interesting.

-= Tuck =-

----- Original Message -----
From: "Richard W Travsky" <rtravsky@uwyo.edu>
To: <dinosaur@usc.edu>
Sent: Tuesday, March 18, 2003 5:41 PM
Subject: Length of Day during Dino times?

> Casual reading an article on the web about the moon states that a billion
> years ago the day was around 18 hours long.
> What I'm curious about is how much shorter the day was during dinosaur
> times. With a shorter day, my guess is the night side of the planet
> would've had less time to radiate daytime acquired heat. This would've
> meant less daily variation with a night time temperature closer to the
> day time temperature ("closer" being a relative term, of course, and
> ignoring other pesky things like latitude). One of the pieces of the
> argument over whether or not dinosaurs were "warm blooded" is how fast
> could they warm up in the morning.
> If the nights did not get as cold, this might have been less of an issue.