An aerospace engineer claims to have invented an engine that needs no propellant https://t.co/nrv5YIdmhd
— The Economist (@TheEconomist) November 29, 2016
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from Twitter https://twitter.com/pimcbe
An aerospace engineer claims to have invented an engine that needs no propellant https://t.co/nrv5YIdmhd
— The Economist (@TheEconomist) November 29, 2016
//platform.twitter.com/widgets.js
from Twitter https://twitter.com/pimcbe