Physicist Brian Greene explains how the prevailing theories about the fabric of space changed dramatically in the last century — twice. The most recent shift in thinking came about from a strange mistake, and revealed hidden truths about the nature of our universe. Later in this episode, Greene talks more about why this discovery hints at the existence of other universes.
What's six miles wide and can end civilization in an instant? An asteroid — and there are lots of them out there. With humor and great visuals, Phil Plait enthralls the TEDxBoulder audience with all the ways asteroids can kill, and what we must do to avoid them.
The SETI Institute's Jill Tarter wants to accelerate our search for cosmic company. Using a growing array of radio telescopes, she and her team listen for patterns that may be a sign of intelligence elsewhere in the universe.
When the stage lights go up at Chicago's Goodman Theatre on Monday evening, more than 20 high school students will each have a moment to step into the spotlight and perform a monologue from one of the plays written by the late August Wilson. Chicago's contest is one of several regional finals that strives to introduce students to the Pulitzer Prize winner's work. It's also a lead-up to the national August Wilson Monologue Competition that will be held on Broadway later this spring.