Science is a marvel—an instrument fueled by curiosity and caffeine that spews forth answers to fundamental questions about nature. The funny thing about this seeming cornucopia of ideas, however, is that the more we learn about the universe, the less we seem to know. Every result yields new conundrums that frequently outnumber the settled issues. We might think we're striding down the road to ultimate knowledge, when in fact we're on a treadmill that occasionally—if only temporarily—sweeps us backward.
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