What does Botox do to your face?

Does Botox harm your face? Why is the speed of aircraft limted? Does the cause of death determine the rate of decomposition of the body? Do only green plants produce chlorophyll? Can we create false gravity in space using centrifugal force? What happens to ashes when they are buried? Do children inherit palm prints from only one parent? Plus, 75 million year-old dinosaur cells... Like this podcast? Please help us by supporting the Naked Scientists