May 10 2018 43 mins 261
Earth has shaped the way humans look and behave. How will future generations in space evolve under radiation and little gravity?
Sources:
How Many People Can Earth Support?:
https://www.livescience.com/16493-people-planet-earth-support.html
"The power of population is so superior to the power of the Earth to produce subsistence for man, that premature death must in some shape or other visit the human race."
AFTER EARTH: WHY, WHERE, HOW, AND WHEN WE MIGHT LEAVE OUR HOME PLANET:
"Earth won't always be fit for occupation. We know that in two billion years or so, an expanding sun will boil away our oceans, leaving our home in the universe uninhabitable-unless, that is, we haven't already been wiped out by the Andromeda galaxy, which is on a multibillion-year collision course with our Milky Way."
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