One day in 1997, Sila Sutharat, from Phetchaburi in Thailand, was hit by the sunlight reflected off the window of a passing bus, and felt its heat. This gave him the idea to roast chicken with sunlight, which he has now been doing for 20 years. Instead of a charcoal fire, he uses 1,000 mobile mirrors that concentrate sunlight into a strong beam, which exceeds 300˚ Centigrade (572˚F). odditycentral. com, 14 June 2017.