The History Channel is running great shows today, including a two-hour feature on the important contributions of Bruce Lee to martial arts, physical fitness, and culture...several eps of "The Universe", including a fascinating two-hour show about the Big Bang and the ultimate fate of the universe, which at the moment is the "Big Rip", when all matter will rip apart to leave a dead cosmos...and a couple of shows exploring the history of comic book superheroes and their influence on culture throughout the decades.
Good stuff. http://www.history.com/schedule#afternoon
