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[科学美国人60秒] 【整理】SSS 2009-01-09

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  This podcast is brought you by Scientific American Instant Egghead Guide to the Mind. For more information, go to ‘instant egghead.com’.

  This is Scientific Americans 60-second Science. I’m Karen Hopkin. This will just take a minute.

   Have you ever turned off your lights and heard-(BUZZING)? To you, it’s a sound that signals bites in the night, but to a male mosquito it’s a love song produced by a female seeking a mate. Now scientists in Cornel University find that males who answer that call join in the serenade. And the two sing in harmony as they check each other out. Working with Aedes aegypti mosquitoes, the pests that carry dengue fever, the scientists tethered individuals to a special insect pin and allowed them to fly past a potential mate. They found that females on their own, whine at a frequency of 400 hertz. Whereas a single male buzzed about 600. But when the two come together, they perform a duet in which their beat of their wings reaches to a frantic 1200 hertz. Isn’t it beautiful? Mosquitoes seem to think so, which is a surprise because researchers had previously thought that female mosquitoes were deaf. But the Cornel Scientists found that mosquito’s ears are good up to 2000 hertz. Results published in the January 9th issue of Science. Maybe that harmonizing could be exploited for controlling mosquito populations. Releasing into the wild males that can’t sing could be a real buzz-skill.

  Thanks for the minute. For Scientific Americans 60-second Science, I’m Karen Hopkin.

[ 本帖最后由 maixianliu 于 2009-1-31 22:39 编辑 ]
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