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An invisible, ancient source of energy surrounds us—energy that powered the first explorations of the world, and that may be a key to the future.
I almost didn't make a best-of list this year, but as I clicked through the year's post, it was hard not to. If last year (and maybe the year before ) was the year of the gigantic graphic, this was the year of big data. Or maybe we've gotten better at filtering to the good stuff.