![]() The first wave will be slow, no faster than we can afford. But it may be cheaper for the probes to manufacture humans in situ, using cell synthesis and artificial womb technology. One percent of the helium-3 fusion fuel available from the planet Uranus, for example, would be enough to send a giant interstellar ark, each ark containing a billion people, to every star in the Galaxy. We'll probably start as we have in the Solar System, with automated probes. We might use ion rockets, solar sails, gravity assists. ![]() Want me to tell you how? Turns out it's all a question of economics. ![]() Or we could be on our way to populating the Galaxy. We could all choke to death, be extinct in a hundred years. You don't need me to stand here and tell you that. Tonight I want to tell you why I care so much about this issue that I devoted my life toil. I've bored you with that often enough already, right? So tonight I want to look a little farther out. ![]() In fact, in the past I've tried to get you to pay for such things. You know I've campaigned for, among other things, private mining expeditions to the asteroids. To two space cadets: My nephew, James Baxter Kent Joosten, NASA ![]()
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