Fire | combustion
Learn about the colour, shape, and movement of fire. The original source of fire undoubtedly was lightning, and such fortuitously ignited blazes remained the only source of fire for aeons. For some years Peking man, about 500,000 bce, was believed to be the earliest unquestionable user of fire; evidence uncovered in Kenya in 1981 and in South Africa in 1988, however, suggests that the earliest controlled use of fire by hominids dates from about 1,420,000 years ago. Not until about 7000 bce did...
Source: britannica.com