Re: Interesting, but radiation killing through water?
I thought water was supposed to be an excellent protector against radiation?
I had to look it up as I couldn't remember, but "secondary muons generated by cosmic rays hitting the atmosphere can penetrate to the Earth's surface, and even into deep mines." For the length of time the Earth was purportedly showered with an intensified amount of this radiation, it would have been difficult and unlikely for large animals to avoid exposure.