High-speed photography shows the flapping of a hummingbird's wings and the passing of a bullet

Mathematicians have used photos to look at where in the twists and turns of a whip the crack sound comes when the whip is breaking the sound barrier.Meteorologists and environmental scientists show the growth of major hurricanes and the recession over the years of many of the world's glaciers.Slow-motion film or high-speed photography have shown us the beating of a hummingbird's wings and the course of a bullet through its target.In one project, cadavers,that's dead bodies,were frozen and sliced into thousands of wafer-thin discs.