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Old 03-18-2021, 12:08 PM   #21
DSettahr's Avatar
Join Date: May 2007
Posts: 5,296
I should've clarified- I was mainly referring to how those isolated lakes/ponds were populated with fish originally. Over the timeframes involved since the ice age, even infinitesimally small chances of a rare occurrence can (and do) add up to a "pretty good" chance of that rare occurrence happening.

I did some quick math, and given 100 potential visits per year to an isolated body of water by a bird traveling from another body of water, each with a one in a million chance of transporting eggs, the odds of it having happened at least once in the 11,700 years since the end of the ice age are 69%. In comparison, just to exemplify just how far outside the realm of easy comprehension 11 millennia is, you could play the lottery 100 times a year for your entire adult life (60 years) with the same odds of winning (one in a million) and your odds of winning at least once over those 60 years are only 0.6%.

(Note that these are completely made up numbers for the sake of argument to show that even very unlikely events are bound to happen over long enough time periods.)

I agree that in given the much shorter timeframe involved with the rise and subsequent fall of acid rain, humans are probably much more likely the culprit.
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