KQED PBS NewsHour October 16, 2015
Theres been speculation that humans basically used to sleep when it got dark, which would mean theyd sleep 10, 11, even 12 hours. It turns out that thats not the case. Sreenivasan all that and more on tonights pbs newshour. Major funding for the pbs newshour has been provided by bnsf. And by the alfred p. Sloan foundation. Supporting science, technology, and improved Economic Performance and Financial Literacy in the 21st century. Support also comes from Carnegie Corporation of new york. A foundation created to do what Andrew Carnegie called real and permanent good. Celebrating 100 years of ph...
Source: archive.org
