About this video
A visual experiment exploring parabolas and the laws of nature.
From the popular science radio show, Radiolab, comes a visual and audio exploration of parabolas, both natural and man-made.
A keen-eyed (or keen-brained) Vimeo user has pointed out that many of the shapes are not parabolas but catenaries. Click on the Wolfram|Alpha links to the right to explore the mathematical distinction.