“A tortoise challenges Achilles, the swift Greek warrior, to a race, gets a 10m head start, and says Achilles can never pass him. When Achilles has run 10m, the tortoise has moved a further metre. When Achilles has covered that metre, the tortoise has moved 10cm…and so on. It is impossible for Achilles to pass him. The paradox is that in reality, Achilles would easily do so.”

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I think my brain just imploded. Anyway, a young physicist in New Zealand has solved this paradox and in doing so has made some ground-breaking discoveries in our understanding of time. [via Rik]