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."
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.
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.
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.
Originally published on Fri March 8, 2013 11:22 am
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."
Roman Catholic cardinals have been meeting at the Vatican to get to know each other better and to set a date for the start of the conclave that will choose the next pope. On Thursday, this cardinal was walking to one of those meetings.
Originally published on Fri March 8, 2013 10:41 am
Update at 11:36 a.m. ET. Starts Tuesday:
"The eighth General Congregation of the College of Cardinals has decided that the Conclave will begin on Tuesday, 12 March 2013," reads a statement just sent to reporters by the Vatican Press Office. It adds that:
"A pro eligendo Romano Pontifice Mass will be celebrated in St. Peter's Basilica in the morning. In the afternoon the cardinals will enter into the Conclave."
Our original post — "Cardinals Expected To Set Date For Start Of Conclave":