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What inspired Abe Lincoln to grow a beard?

What inspired Abe Lincoln to grow a beard?

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1:04
Your Tax Day guide to the new health care penalties

Your Tax Day guide to the new health care penalties

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6:52
Would $15 save employees and break employers?

Would $15 save employees and break employers?

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9:09
How America moved on in the days after the Civil War

How America moved on in the days after the Civil War

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10:22
Singer Rhiannon Giddens taps America’s deep musical roots

Singer Rhiannon Giddens taps America’s deep musical roots

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6:25
Tehran’s ‘Mr. Big Mouth’ on deep-rooted hatred of the West

Tehran’s ‘Mr. Big Mouth’ on deep-rooted hatred of the West

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6:38
Under Pope Francis, Vatican changes tone toward U.S. nuns

Under Pope Francis, Vatican changes tone toward U.S. nuns

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4:26
Why unions aren’t happy about a fast-track trade deal

Why unions aren’t happy about a fast-track trade deal

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3:20
Is Google’s search engine dominance hurting EU consumers?

Is Google’s search engine dominance hurting EU consumers?

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5:39
Why it's so hard to get off welfare

Why it's so hard to get off welfare

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7:43
‘There was no playbook’ for handling the OK City bombing

‘There was no playbook’ for handling the OK City bombing

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14:55
Why teens are suing states to force environmental action

Why teens are suing states to force environmental action

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9:05
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PBS News Hour

How drinking water pipes can also deliver electric power

Hydroelectricity -- using the flow of water to generate power -- has long been a small but key source of renewable energy. How can cities around the country better harness that potential? A startup in Portland, Oregon, has developed a system that gets energy from gravity-fed drinking water pipes to produce electricity without any environmental impact. Hari Sreenivasan reports.
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