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Re: Were the dinosaurs fried by ultraviolet light?



On Fri, 5 May 2000 KiernanCR@aol.com wrote:
> >>In a recent paper communicated in Ecology Letters, they explain that the
> levels of nitrogen and sulphur oxides produced during the impact event would
> have all but destroyed the ozone layer, thereby doubling the levels of
> lethal UV radiation incident on the earth's surface. This deluge of ionising
> radiation would have put additional stresses on the biosphere already
> stretched to the extreme by the impact.<<
> 
> Which makes me think, as so many things often do, about the frogs. Being 
> extremely sensitive to UV radiation, and enviromental stresses in general, 
> why were they spared if the biosphere was suddenly bombarded with twice the 
> normal levels of UV rad.?

Those that were nocturnal, lived in lots of foliage, etc, may have been
protected to some degree.