Popular Science -
30 Aug 2013 17:00

If you burn about 80 calories per mile walked, you'd need two trillion PowerBars to fuel the trip. If you started just before the first dinosaurs appeared, you'd probably be finishing your hike just about now. Here's how it breaks down: One light-year--the distance light travels in one year, used as the yardstick for interstellar distances--is about 5.9 trillion miles. If you hoofed it at a moderate pace of 20 minutes a mile, it would take you 225 million years to complete your journey (not incl...
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