Will DARPA Build a Nuclear Space Force?

Will DARPA Build a Nuclear Space Force?
(Robert Markowitz/NASA via AP)

Space is big. Like big enough to boggle the mind.

To get an idea of just how big space is, try scrolling across this "tediously accurate scale model of the solar system." (Expect to spend your first few minutes just reaching the asteroid belt -- and still only be about 1/10 of the way to Pluto.)

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