This is a cool lecture from Lawrence Krauss posted at Open Culture, via Richard Dawkins - the lecture is called Hiding in the Mirror: The Mysterious Allure of Extra Dimensions.

Lawrence Krauss on the Mysterious Allure of Extra Dimensions

in Physics | January 4th, 2012

In the world of everyday experience we perceive three dimensions of space. Through any point, no more than three perpendicular lines may pass. The notion that there might be more than three dimensions has traditionally been the domain of science fiction shows like The Twilight Zone.

In this engaging lecture (click image above to watch), theoretical physicist Lawrence Krauss explains the growing respectability of extra-dimensional theories in physics, tracing the evolution of the idea from Plato’s cave through Edwin A. Abbott’s Flatland, and from Einstein-Minkowski spacetime through Kaluza-Klein theory, on into modern-day string theory.

Titled “Hiding in the Mirror: The Mysterious Allure of Extra Dimensions,” Krauss’s presentation was given in September at a conference in Oslo, Norway, organized by the Fritt Ord Foundation. The speech lasts about an hour and is followed by a question-and-answer session.

via Richard Dawkins

Related Content:

• Lawrence Krauss Explains How You Get ‘A Universe From Nothing’
• Lawrence Krauss: Every Atom in Your Body Comes From a Star
• Free Physics Courses (From our big collection of Free Online Courses)