check out what stephen hawkings sayin click the link http://www.popsci.com.au/space/space-travel/stephen-hawking-says-we-have-100-years-to-colonize-a-new-planet8212or-die-could-we-do-it,460555
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From @sydneyguy1
check out what stephen hawkings sayin click the link http://www.popsci.com.au/space/space-travel/stephen-hawking-says-we-have-100-years-to-colonize-a-new-planet8212or-die-could-we-do-it,460555