How old is that fossil in the window? In this BrainPOP UK movie on carbon dating, Tim and Moby will teach you about how scientists use a radioactive isotope called carbon-14 to find out the answer! In this educational, animated movie learn about key terms like half-life, radioactive decay, and radiometric dating and how they all work! You’ll also see how you can tell when a fossilised animal died by comparing the amount of carbon-14 that would have been in a living creature to the amount that’s left in the fossil. Carbon dating is cool!