There are many questions to which the answers seem imperfect. “Where do umbrellas go?”, for example, is one of the common questions we rarely find a solution to. However, if we live in Amsterdam (Netherlands), there is a more pertinent one: where do stolen bicycles go? In the Dutch capital, it is estimated that around 28,500 bicycles are stolen every year, but it is not known what happens to them. Or rather, it was not known – Science came to lend a hand to the police to catch bicycle thieves.