Why We Explore: A Comet Tale Told in Four Pictures

There are many ways to explain the reasons for space exploration: the technological spin-offs, the science-education value, the commercial potential of space, the pragmatic lessons back home in everything from space-weather forecasting to mineral exploration. I’ve seen plenty of evidence that all these things are true, yet they dance around the most essential and least tangible motivation.

We explore because it is what living things do. Movement and the acquisition of knowledge are integral t

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