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    Beyond Falsetto: Do mice sing at ultrasonic frequencies?

    Male mice may serenade prospective mates at pitches about two octaves higher than the shrillest sounds audible to people.

    This "mouse song" is comparable in complexity to the sequences of tones that songbirds and some whales make, say Timothy E. Holy and Zhongsheng Guo of Washington University in St. Louis.

    Other researchers remain guarded about labeling...

    11/02/2005 - 13:16 Animals