Asked by: Dan, Stockport
Sulphites are sulphur compounds that occur naturally in the grapes and hops used to make wine and beer. They prevent the growth of the bacteria that make the drink go cloudy and literally turn the alcohol to vinegar. Most wines and beers have extra sulphites added and some people claim that this can cause headaches. But there is more sulphite in a dried apricot than there is in a glass of white wine.
Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.