The Wisdom of Crowds (with Marcus Du Sautoy)
From guessing the weight of a cow or the number of sweets in a jar, there is evidence that the average of a crowd's guesses can deliver surprisingly accurate results.
Professor du Sautoy carried out a number of live interactive quizzes and experiments to test these ideas and look at how these principals can be harnessed for citizen science projects.
https://www.youtube.com/embed/s7tngG2kAik