"The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary." ~ H.L. Mencken
How Hummingbirds Hum
Submitted by Westernerd on Sat, 2011-09-10 03:00
in
"A Yale University zoologist has used a laser vibrometer and high speed videos from a wind tunnel to work out how the hummingbird makes its famous hum, and found that the males of each species have their own signature sound."
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