Before humans took to the skies in metal tubes powered by jet engines, there was a gentler mode of transport that we used to conquer the skies: the humble balloon.
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Apply for Skycademy 2016
Before humans took to the skies in metal tubes powered by jet engines, there was a gentler mode of transport that we used to conquer the skies: the humble balloon.
See the rest here:
Apply for Skycademy 2016