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Acoustic levitation allows small objects, like droplets of liquid, to float. Unless you travel into the vacuum of space, sound is all around you every day. But most of the time, you probably don't think of it as a physical presence. You hear sounds; you don't touch them. The only exceptions may be loud nightclubs, cars with window-rattling speakers and ultrasound machines that pulverize kidney stones. But even then, you most likely don't think of what you feel as sound itself, but as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. The process can take place in normal or reduced gravity. In other words, sound can levitate objects on Earth or in gas-filled enclosures in space. These straps keep the bag close to the body, and eliminate painful bouncing or jostling against the back. Well-designed straps also make it easier for serious fitness buffs to transport heavy gear comfortably, including sports equipment and special weightlifting accessories. A gym bag worn over the shoulder or on the back keeps your gear close to reduce the risk of theft, and also keeps your hands free to hold on in a crowded subway or bus. Any yoga fan can tell you that the average gym bag is simply not large enough to accommodate a yoga mat. Those who wish to skip the house mats at the gym are forced to leave the end of the mat sticking out of a gym bag, which makes it easy for the mat to roll out and hit the floor. Others simply juggle both a regular gym bag and a hand-held yoga mat as they travel to and from the gym.|The NLOS cannon: The reason your day's about to take a turn for the worst. See more images of the Army. It's 2012, and you find yourself in the precarious position of being a soldier in a military that's embattled against the United States. The caravan of armored vehicles you're a part of comes to a halt. An unmanned aerial drone has just appeared over the horizon, flying toward the caravan. You and several members of your platoon are ordered out of your vehicle to destroy the reconnaissance drone. You look upward to the curious sight of several small parachutes suspending what looks like canisters, drifting toward the caravan. Strangely, despite a crosswind that should be carrying the canisters away, you notice that each one is headed directly for a vehicle. You hear someone shout "cluster bomb!" in your native language, followed by a body-rattling, quick succession of explosions. Your vision blurs, you hear only a single high-frequency note.  corona virus update

















































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