Physicist Brian Greene helps to explain superstring theory, a concept that minuscule strands of energy vibrating in 11 dimensions create every particle and force in the universe. Watch this TED video to see how superstring theory works.
Plato's Films - My Philosophy Guru, Mark Vernon, Genuinely Useful, Lucid, Informative and Wise
Yahoo! presents "The Flip Side," a video parodying what gyms would be like if fit-focused men and women traded their stereotypical roles.