A superteam of British scientists and investigator are working on a nanotechnology that , when applied to gun cartridges , act as microscopical tatter that place themselves on and around everything they amount in physical contact with , such as criminals . The bullet train tags are part natural pollen , part nanoparticles that are extremely difficult to launder off and can also keep skin cell gravel to the gun cartridge . The technology is said to be oestrus - insubordinate , cost effective and could be in employment within a year . [ PhysOrgviaPop Sci ]
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