[Tweeters] Why don't woodpeckers get concussions?

Douglas Robberson dlrobbo at comcast.net
Thu Apr 12 15:31:50 PDT 2012


Interesting article.

http://www.msnbc.msn.com/id/47006033/ns/technology_and_science-science/#.T4TYd1EV2xA

Doug Robberson
Tigard, OR




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