The respect does not exist no serious research, but the scientists have some palpites. “To fry an egg, the surface where it goes to occur the fritura must be to ones 60 ºC. I find that in a city as Rio De Janeiro, of the one to reach this temperature when the ambient temperature is about 40 ºC”, affirms Jivaldo chemistry of the Matos Rosary, of the University of São Paulo. So that the fritura occurs, it is better that the egg is in asphalt - it is black, he does not reflect no specter of solar light and slowly goes absorbing the heat. Second, the humidity of necessary air to be low, so that the heat emitted for asphalt is not reduced by the vapor of agua in the atmosphere. In days when the thermometers mark around 40 ºC, with the sun the bolt, is well possible that the temperature of asphalt pass of the 60 ºC. The egg receives this transference from heat and starts to fry. This rolls because the proteins that exist mainly in the clear one pass for a regrouping: they move of a half weak union, that of a gosmenta consistency of the raw egg, for a stronger union, generating the consistency most solid of the egg I fry. Then, already she knows: in the lack of a frying-pan, she waits one day hot and dry pra to make a beautiful omelette!