"Rare Vintage Photo Captures Four-Person Double-Decker Bicycle in Action"
A vintage photo from 1948 shows a double-decker, four-person bicycle invented by Art Rothschild, with one person sitting on the bottom and the other three sitting in the air above the ground-level biker. The bike is powered by five chains and has brakes on both wheels. Rothschild broke three ribs while learning to ride it.