Space: The Increasingly Crowded Frontier

MIN READMar 25, 2016 | 09:15 GMT

German astronaut Alexander Gerst's selfie during a spacewalk in 2014 outside the International Space Station.

(ALEXANDER GERST/ESA via Getty Images)

More countries and companies than ever can reach Earth orbit. Cheaper launch options and wider access to them has brought numerous new players into what was once a relatively closed arena of competition....

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