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Colo. Voters Legalize Pot, State Anxious Over Gov't Reaction

Colo. Voters Legalize Pot, State Anxious Over Gov't Reaction

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Brooks and Marcus on Government 'Gifts' and Gaza Conflict

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Obama Spent 10 Times as Much on Social Media as Romney

Obama Spent 10 Times as Much on Social Media as Romney

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Incoming Independent Senator King on Caucusing With the Dems

Incoming Independent Senator King on Caucusing With the Dems

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Future Unclear for Sandy Victims Dealing with Insurance Woes

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Egypt Hopes to Broker Cease-Fire Between Israel and Hamas

Egypt Hopes to Broker Cease-Fire Between Israel and Hamas

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For Displaced Syrians, Turkey Acts as Lifeline

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With Obama's Visit, Myanmar Looks Towards Greater Democracy

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Jennifer Fitzgerald Reads Poems about Hurricane Sandy

Jennifer Fitzgerald Reads Poems about Hurricane Sandy

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PBS News Hour

The Power of Sleep: Why Humans Can't Stop Snoozing

Sleep deprivation can cause serious health and cognitive problems in humans. In short, it can make us fat, sick and stupid. But why humans do need so much sleep? Science correspondent Miles O'Brien talks to scientists on the cutting edge of sleep research and asks if there's any way humans might evolve into getting by with less.
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