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March 20, 2013 09:11 am PDT
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/rVkGSPABeLI/evolution-happens-even-in-okl.html
Evolution happens. Even in Oklahoma.
In Tulsa, Oklahoma, over the last 30 years, the number of cliff swallows killed by moving vehicles has drastically decreased. That change can't be accounted for by alterations in traffic patterns or swallow populations, say scientists. Instead, they think it's tied to the fact that the birds' wingspan is also decreasing. This adaptation — whether [...]Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/rVkGSPABeLI/evolution-happens-even-in-okl.html
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