Why a cat always lands on its feet

In 1894, a French scientist used a camera to solve a physics problem. Join the Video Lab! Étienne-Jules Marey was a French scientist and inventor who analyzed how things moved. He developed a way to photograph multiple stages of movement onto a single glass plate, a technique called chronophotography. Later, when Kodak introduced celluloid film, Marey swapped the glass plate for a roll of film that moved in between exposures. This technique formed the basis of cinematography, and i