Make way for the antimatter gun. A tabletop device just 10 square metres in size can spit out energetic bursts of positrons as dense as those kicked out by the giant particle-factories at CERN. Each positron-packed bullet lasts for just a fraction of a second, so don't expect to fill the tank of your antimatter engine any time soon. Instead, the smaller, Cheaper machine might help labs around the world study deep-space objects such as powerful radiation jets squirted out by black holes.
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