DEGRASSE TYSON: And now for some
final thoughts on living forever. The urge to not want to die is as natural as
life itself. But you should always be careful what you wish for. One day, it
just might come true. If, starting now, everyone in the world lived forever,
then Earth's current population of seven billion, which would, at its current
rate of growth, double in 60 years, would instead double in only 35. Take this
forward six centuries or so, and you have so many people on Earth that
everybody will have to stand up straight, just to fit on all the world's land
area. So that leaves interplanetary colonization as the only obvious next step
to accommodate such vanities. But not all planets are Earth-like. Actually,
none of the known planets, inside or outside our solar system, are Earth-like.
Which means if bio-mechanical genetic engineering is what grants you
immortality, then why not alter or enhance our organs in ways that allow us to
thrive under the exotic conditions of alien planets? And that could only be decades
away. There's just one catch. You need a space program capable of leaving
Earth entirely, rather than just driving round the block in Earth orbit. Until
then, our bodies may out-advance our access to space, making Earth a very
crowded place to come. And that is the Cosmic Perspective.
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