Petrifaction, or petrification, defined as turning people to stone, is a common theme in folklore and mythology, as well as in some works of modern literature. Amos Brown noted that "Fossils are to be found all over the world, a clear evidence to human beings from earliest times that living beings can indeed turn into stone (...) Previous to the modern scientific accounts of how fossils are formed, the idea of magicians or gods turning living creatures into stone seemed completely plausible in terms of these cultures".