Crocs, Amphibians, Small dinosaurs and the Impact theory.

[Mike Lima <taradosgon@yahoo.com>]

I've heard Bakker use the fact that amphibians are the
most sensitive to climate change to argue against the
Impact Theory and in favor of disease. What about in
the Permian-Triassic extinction event? Does he favor
disease there too?

Moving to the other side. I admit that frogs are very
sensitive animals. So if the Permian-Triassic
extinction was caused by a massive drought and
increasing temperature and the K-T extinction by a
comet impact how did the amphibians survive? In WWM
the labyrinthodont "cocooned" itself (in what
exactly?) in an attempt to wait out the drought. Do
amphibians do this?  

The same question for Crocodiles as well. If they
cannot tolerate colder climates (which is why
labyrinthodonts survived for extended periods in
colder areas?) how can they tolerate the sun being
blocked out? 

Lastly, in reference to the impact theory, after going
to

http://www.usatoday.com/news/science/aaas/2001-11-24-dinosaur-extinction.htm

it says that the since only fern species were dominant
after the K-T boundary all the herbivorous dinosaurs
including the small "polar dinosaurs" died out. How is
this evidence as to why the "polar dinosaurs" died out
if they were more adapted to the cold and (as far as I
know) weren't ferns an adequate food source for the
small herbivores?


                
__________________________________ 
Start your day with Yahoo! - Make it your home page! 
http://www.yahoo.com/r/hs