The third and final episode of "The Elegant Univserse" shows how in 1995 Edward Witten of Princeton's Institute for Advanced Study, aided by others, revolutionized string theory by successfully uniting the five different versions into a single theory that is cryptically named "M-theory," a development that required a total of 11 dimensions. Ten... 11... who's counting? But the new 11th dimension is different from all the others, since it implies that strings can come in higher dimensional shapes called membranes, or "branes" for short. These possess truly science-fiction-like qualities, since in principle they can be as large as the universe. A brane can even be a universe - a parallel universe - and we may be living in one right now.
D-Day's Sunken SecretsEscape from Nazi AlcatrazWhy Sharks AttackWild Predator InvasionGreat Cathedral MysteryRoman Catacomb MysteryGhosts of Murdered KingsKiller TyphoonZeppelin Terror AttackAlien Planets RevealedAsteroid: Doomsday or Payday?At the Edge of SpaceCold Case JFKMaking Stuff SaferMaking Stuff ColderMaking Stuff WilderMaking Stuff FasterMegastorm AftermathGround Zero SupertowerOklahoma's Deadliest TornadoesManhunt—Boston Bombers
Vermont transplant and Guster frontman Ryan Miller seeks out far-fetched friends across the state! Available exclusively online.
Check out winning Vermont entries to the 2014 PBS Kids Writers Contest!
Tons of videos and games for children from PBS!