Originally published on Mon December 16, 2013 2:43 pm
In this episode, TED speakers look up to the night sky and consider our relationship with what might out there.
Gazing up at the night sky is simultaneously humbling and utterly thrilling. This hour, we'll hear from TED speakers who share an infectious sense of wonder and curiosity about our place in the universe and what lies beyond our skies.
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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.
Is there more than one universe? Physicist Brian Greene shows how the unanswered questions of physics (starting with a big one: What caused the Big Bang?) have led to the theory that our own universe is just one of many in the "multiverse."
Proving they can't be outdone by Rand Paul, NPR's Ken Rudin and Ron Elving filibuster their way through the latest podcast, assessing Jeb Bush's words on immigration, President Obama's strategy on sequestration, Donald Trump's attendance at the CPAC occasion and the results of the Los Angeles mayoral election.
A North Korean soldier reacts as he patrols along the Yalu River near the Chinese border last month.
Credit Mark Ralston / AFP/Getty Images
North Korea responded to new U.N. sanctions aimed at starving its nuclear program by vowing to cut a Cold War-style hotline and scrap a nonaggression pact with the South.
State-run media said North Korea "abrogates all agreements on nonaggression reached between the North and the South ... and also notifies the South side that it will immediately cut off the North-South hotline."