#sound (2 Posts)
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Why Do Your Knees Click? What Your Joints Are Trying to Tell You Why your knees often make a noise when you move them... -
NASA's DC-8 Aircraft to Fly Low Over Seoul for Air Quality Study A large observatory from the National Aeronautics and Space Administration NASA will be flying at very low altitude over the Seoul metropolitan area tomorrow to study air quality in Asia. The plane is likely to generate noise, so be careful...
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