You may have heard this week about a new building at 20 Fenchurch St, in the City of London. The 37-storey skyscraper, which has already been dubbed the 'Walkie-talkie' due to its unusual shape, has been blamed for cooking a number of vehicles parked nearby. Some suggest that this might be due to the novel shape of the building, which causes it to act as a parabolic reflector, targeting sun's rays. Here's the quick fire science behind parabolic reflectors and their uses. Like this podcast? Please help us by supporting the Naked Scientists