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Courtesy Science Friday
It's Friday, so it's time for another Science Friday video... The honk of a horn or the rumble of a truck sounds like noise to most of us. But to Lucy Fitz Gibbon, and others with absolute pitch, there are notes embedded in that noise. Psychiatry professor David Ross, of the Yale School of Medicine, explains what's known about how people acquire this mysterious ability.

It's Friday, so it's time for a new Science Friday video.

Science Friday
Science FridayCourtesy Science Friday

How would you describe the size of a wind turbine? There's no right answer. Turbines come in different varieties tuned for different uses. Compare the 256-foot-tall Gamesa G87 turbines, found at Bear Creek Wind Park in Penn., with the mini turbines developed by Bergey Windpower in Norman, Okla. The scale of both may surprise you.