Old-time photography Old-time photography Old-time photography, also known as antique and amusement photography, is a genre of novelty photography. Old-time photography allows consumers to pose as if for an antique photo in costumes and props from a particular period, sometimes printed in sepia tone to give the photo a vintage look. Popular themes include the Old West, the Victorian era, or the Roaring Twenties. Some studios specialize in the genre, and others ply their trade at festivals and historical reenactment events. It is a popular family activity at amusement parks and other tourist destinations, mostly in the United States. Many of these
Age of the Earth elements over time. By measuring the concentration of the stable end product of the decay, coupled with knowledge of the half life and initial concentration of the decaying element, the age of the rock can be calculated. Typical radioactive end products are argon from decay of potassium-40, and lead from decay of uranium and thorium. If the rock becomes molten, as happens in Earth's mantle, such nonradioactive end products typically escape or are redistributed. Thus the age of the oldest terrestrial rock gives a minimum for the age of Earth, assuming that no rock has been intact for longer than