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Challenge Question #2
Carol Gersmehl, Macalester College
"Approximately how many hours does the typical trip across the Gulf of
Mexico take, if a hummingbird beats its wings 4 million times at a rate of
75 wing-beats per second?"
(This question was asked as part of the
March 20, 1997 Ruby-throated Hummingbird Migration Update).
How to Respond to Journey North Challenge Question #2
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