What are stem cells and why are they so controversial? In this BrainPOP UK movie, Tim and Moby give you the rundown on what makes stem cells different from regular cells. In this animated, educational movie they’ll show you how stem cells may one day be used to cure diseases and grow new organs and limbs. And if you’re confused about the difference between adult and embryonic stem cells, you’re in good hands — Tim will teach you about both types, and explain why some people come down against one of them. You’ll also learn why scientists are so interested in embryonic stem cells, and what makes them so much more promising than the adult kind. Do you support stem cell research? Watch the movie and decide for yourself!