Photography derives from the Greek words for "light" and "to write" and the word was coined by Sir John Herschel in 1839. Early philosophers and mathematicians described the principles of the pinhole camera as early as the 5th century BC, though the first photographs were not made until combining several technical discoveries. Cameras are now widely used around the world to capture wonderful sights and are symbols of both paparazzi and human freedom and ingenuity.