Science

The Two-Way
12:54 pm
Mon April 29, 2013

Virgin Galactic's SpaceShipTwo Passes First Rocket Test

Originally published on Mon April 29, 2013 3:02 pm

Virgin Galactic's SpaceShipTwo — designed to carry paying passengers beyond Earth's atmosphere — passed a key test Monday, shooting past the speed of sound under its own rocket power.

The spacecraft developed by Sir Richard Branson's space tourism venture dropped from its mother ship over the Mojave Desert and then, for the first time, fired its engine. It hit Mach 1.2 and reached an altitude of 56,000 feet before gliding to a landing.

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Science
3:56 pm
Sun April 28, 2013

The Sounds of Thirsty Trees

Originally published on Sun April 28, 2013 5:38 pm

A team of physicists at Grenoble University in France discovered that trees make different sounds when they are starved for water versus when they are simply thirsty. We hear from Dr. Alexandre Ponomarenko, the lead researcher, and hear a bit of the thirsty tree sounds.

History
3:21 pm
Sun April 28, 2013

First He Invented The Phone. Then, Bell Left A Voice Message

Though the quality of the sound recordings is poor, we know what Alexander Graham Bell was saying because he left transcripts.
Smithsonian's National Museum of American History

Originally published on Mon April 29, 2013 3:28 pm

As the inventor of the telephone, Alexander Graham Bell is credited with bringing countless voices to our ears. And now, for the first time, here he is imploring us to hear his own voice:

The sound is scratchy. You have to strain to decipher it, but the words are clear. They're from Bell's lips, recorded in 1885 but unveiled just last week by the Smithsonian.

"It lets us know what the past was really like. It fills in a gap for people," says Shari Stout, collections manager at the Smithsonian's National Museum of American History.

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Science
5:41 am
Sun April 28, 2013

From Coast To Coast with The Power Of The Sun

Originally published on Sun April 28, 2013 5:40 pm

Transcript

RACHEL MARTIN, HOST:

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Krulwich Wonders...
7:03 am
Sat April 27, 2013

Nobody Throws Balls Like Yu

Jeff Gross Getty Images

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