Massive displays of popular anger on the streets of Iran - not to mention an outpouring of tweets and blogs - leave no doubt that many Iranians suspect they were cheated of a fair result in this month's presidential election. While firm evidence is not easy to come by, this interconnected age makes wrong-doing impossible to hide completely. Statisticians around the world have been combing through the voting figures Iran has posted online, and then published their results on blogs and preprint servers. While their "electoral forensics" have laid to rest some knee-jerk criticisms of the results, they have also highlighted areas where the Iranian protesters seem to have cause for real concern (see page 10).
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