
Do we overestimate how much sleep we need?
Clip: 10/15/2015 | 6m 39s
These hunter-gatherer tribes sleep less than you, and sleep better
By studying the habits of three hunter-gatherer groups who live much the way humans have for thousands of years, a team of scientists is challenging conventional wisdom about how much sleep we need. Hari Sreenivasan goes to UCLA to learn more about getting enough rest and to do something he's never done on assignment before: falling asleep while on the job.
Problems playing video? | Closed Captioning Feedback
Problems playing video? | Closed Captioning Feedback
Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...

Do we overestimate how much sleep we need?
Clip: 10/15/2015 | 6m 39s
By studying the habits of three hunter-gatherer groups who live much the way humans have for thousands of years, a team of scientists is challenging conventional wisdom about how much sleep we need. Hari Sreenivasan goes to UCLA to learn more about getting enough rest and to do something he's never done on assignment before: falling asleep while on the job.
Problems playing video? | Closed Captioning Feedback
How to Watch PBS News Hour
PBS News Hour is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and Vizio.
Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipGetting prisoners life-ready to prevent a return to crime
Clip: 10/15/2015 | 8m 28s | Getting prisoners life-ready to prevent a return to crime (8m 28s)
How social entrepreneurs are changing the world
Clip: 10/15/2015 | 7m 13s | How social entrepreneurs are changing the world (7m 13s)
New suspects identified in Lockerbie bombing case
Clip: 10/15/2015 | 8m 52s | New suspects identified in Lockerbie bombing case (8m 52s)
What influenced the decision to keep troops in Afghanistan
Clip: 10/15/2015 | 4m 11s | What influenced Obama’s decision to keep troops in Afghanistan (4m 11s)
Wisdom from four decades of education reporting
Clip: 10/15/2015 | 7m 21s | Wisdom from four decades of education reporting (7m 21s)
Providing Support for PBS.org
Learn Moreabout PBS online sponsorship- News and Public Affairs
FRONTLINE is investigative journalism that questions, explains and changes our world.
- News and Public Affairs
Amanpour and Company features conversations with leaders and decision makers.
Support for PBS provided by:
Major corporate funding for the PBS News Hour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by...