"Unfolding the impossible: turning a sphere inside out, without a single crease."01 January 1979Factual22 mins
This video is about the problem of turning a sphere inside out, by passing the surface through itself, without making any holes or creases. Mathematicians believed the problem to be unsolvable until 1958, when Stephen Smale proved otherwise. The motion of turning a sphere inside out, called a regular homotopy, is extremely difficult to visualize. The homotopy in this film was developed by Bernard Morin, a blind mathematician. The motion is illustrated with a sequence of chicken-wire models, built by Charles Pugh, showing the crucial stages in the motion. Commentary is provided by mathematicians Nelson L. Max, Stephen Smale, and Charles Pugh, and by physicist Judith Bregmann.
To help visualize the dramatic final chapter in Cassini's remarkable story, NASA's Jet Propulsion Laboratory produced this short film that features beautiful computer-generated animation, thoughtful narration and a rousing score.
A humor-inflected history of the of the number one, covering military applications in ancient Rome, the measurement of distances in India, and the decimal system created by Leibnitz.
This edition includes topics such as exponential functions, common log or base 10, rules of exponents, natural log or base e, applications of exponents, rules of logs, logarithms, solving log equations and converting logs to base 10 or base e.
With all those X's and Y's, pre-algebra can be very intimidating. But with the right preparation, pre-algebra is as easy as 1-2-3! Building on your knowledge of basic math, The Standard Deviants eliminate the intimidation factor by presenting the material in an easy-to-understand manner using plenty of examples and computer graphics.
How can you maximize your chances of living until you’re 100? Why do many of us experience spooky coincidences? Should I take an umbrella? Professor David Spiegelhalter tries to pin down what chance is as he explores the mysteries of probability.
Popular movie trailers from 1979
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