Science

TED Radio Hour
9:00 am
Fri March 8, 2013

Is Our Universe The Only Universe?

"All these possibilities are out there. And we live in the one that is hospital to our form of life." — Brian Greene
James Duncan Davidson/TED

Originally published on Fri August 2, 2013 9:24 am

Part 4 of the TED Radio Hour episode Peering Into Space.

About Brian Greene's TED Talk

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."

About Brian Greene

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TED Radio Hour
9:00 am
Fri March 8, 2013

Are We Alone In The Universe?

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"We should search because it tells us how to collaborate our place in the cosmos." — Jill Tarter
TED / James Duncan Davidson

Originally published on Fri August 2, 2013 9:24 am

About Jill Tarter's TED Talk

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.

About Jill Tarter

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TED Radio Hour
9:00 am
Fri March 8, 2013

How Can We Defend Earth From Asteroids?

Phil Plait knows the secrets to avoiding a big asteroid catastrophe.
Courtesy of TED

Originally published on Fri August 2, 2013 9:24 am

Part 2 of the TED Radio Hour episode Peering Into Space.

About Phil Plait's TED Talk

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.

About Phil Plait

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TED Radio Hour
9:00 am
Fri March 8, 2013

How Did A Mistake Unlock One Of Space's Mysteries?

Nobel Prize winner Saul Perlmutter explains part of his research in astrophysics.
Kimberly White/Getty Images

Originally published on Fri August 2, 2013 9:24 am

Part 1 of TED Radio Hour episode Peering Into Space.

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.

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Environment
1:23 am
Fri March 8, 2013

Past Century's Global Temperature Change Is Fastest On Record

Scientists say they have put together a record of global temperatures dating back to the end of the last ice age, about 11,000 years ago. This historical artwork of the last ice age was made by Swiss geologist and naturalist Oswald Heer.
Oswald Heer Science Source

Originally published on Fri March 8, 2013 9:40 pm

There's plenty of evidence that the climate has warmed up over the past century, and climate scientists know this has happened throughout the history of the planet. But they want to know more about how this warming is different.

Now a research team says it has some new answers. It has put together a record of global temperatures going back to the end of the last ice age — about 11,000 years ago — when mammoths and saber-tooth cats roamed the planet. The study confirms that what we're seeing now is unprecedented.

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