Physicist John Hunter has proposed the constructio... ...Hunter helped to build in the 1990s while at the Lawrence Livermore National Laboratory (LLNL) in California. With a barrel 47 metres lon...http://www.neatorama.com/2009/10/07/physicist-proposes-using-cannon-to-fire-payloads-into-space/
Physicist Proposes Using Cannon to Fire Payloads into Space...
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