Science

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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Animals
3:47 pm
Fri April 26, 2013

Navy Sonar Criticized For Harming Marine Mammals

Transcript

ROBERT SIEGEL, HOST:

The U.S. Navy is planning to ramp up training activities off California and Hawaii. But that has rekindled a battle over Navy sonar, which is known to harm marine mammals. From member station KQED, Lauren Sommer reports.

LAUREN SOMMER, BYLINE: We humans are visual creatures and for good reason. If someone is far away, you can usually see them before you hear them. Underwater, it's the opposite.

BRANDON SOUTHALL: The physical environment of the ocean really favors the use of sound, and the animals have evolved accordingly.

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