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Re: Mesozoic snow?
In article <firstname.lastname@example.org>, wrote:
> Hmmm... that's alot of trouble to go to for display. Seems like they
> would just have evolved bright colors adn funny horns for that.
And a ceratopsian's frill isn't a lot of trouble?
A Bird of Paradise's train (which can be so large as to be a
hinderance to flight)?
The jaws of the [I forget the name. It's in Voyage of the Beagle,
one of the few illustrations. Or is it On the Origin ... found it -
Chalcosoma atlas, Descent of Man, figure 16, which compares the male and
female of the species. See also the next 4 figures.] beetle, which can
be pretty much the same size as the body in the male and are used for
display, not mastication. (The jaws of the females are quite normally
proportioned in contrast.
Darwin devotes a considerable amount of attention to
demonstrating the extent of sexual selection, and it's pervasiveness
through the animal kingdom, and for a good reason - it is a very
powerful force in moulding the structure of animals.
(I choose my latter examples purely because there's a radio
program about Darwin's [great-]^5-grandson wandering around the
Galapagos in great^5-granddad's footsteps. See
http://www.bbc.co.uk/radio4/factual/rams/thu2002.ram but you'll need
Real Player )
"... whilst this planet has gone cycling on according to the
fixed law of gravity, from so simple a beginning endless forms most
beautiful and most wonderful have been, and are being evolved."
Location: 57°10' N, 02°09' W (sub-tropical Aberdeen), 0.021233
Written at Thu, 16 Jun 2005 20:11 +0100
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