- First tests of Perlan 2 Glider turn out a success; engine-less aircraft will be the first to reach the edge of space by surfing the strong air currents of the Polar Vortex by 2016 https://www.washingtonpost.com/news/innovations/wp/2015/09/24/flying-to-the-edge-of-space-without-an-engine-is-an-idea-so-crazy-it-might-just-work/ 28 comments space
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