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How to make an Evap./Swamp Air Cooler using a 5 gallon bucket. Evaporative Cooler works very well. easy to make. powerful breeze. low temps. for even more cooling add ice to the water. holds 2 gallons of water at a time. takes about 15 watts of power

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nextbigfuture.com Author: brian wang

The Lilium Jet successfully completed its maiden test flight series in the skies above Bavaria. The 2-seater Eagle prototype executed a range of complex maneuvers, including its signature mid-air transition from hover mode to wing-borne forward fligh

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https://www.wired.com

For a while there, the hydrogen fuel cell was the darling of the transportation industry. It would provide the zero emission propulsion of a battery-powered car, the refueling time of a gas-powered car, producing nada but drinkable H20 as a byproduct