through gradual temperature increase

    There's an old folk warning that if you throw a frog in boiling water he will quickly jump out. But if you put a frog in a pan of cold water and raise the temperature ever so slowly, the gradual warming will make the frog doze happily . . . in fact, the frog will eventually cook to death, without ever waking up.

    keyboard shortcuts: previous photo next photo L view in light box F favorite < scroll film strip left > scroll film strip right ? show all shortcuts