California Institute of Technology

Learning to tolerate our microbial self

(PhysOrg.com) -- The human gut is filled with 100 trillion symbiotic bacteria—ten times more microbial cells than our own cells—representing close to one thousand different species. "And yet, if ...

Apr 21, 2011
5 / 5 (8) 0 | with audio podcast

Why do we sleep?

While we can more or less abstain from some basic biological urges—for food, drink, and sex—we can’t do the same for sleep. At some point, no matter how much espresso we drink, we just crash. ...

Feb 03, 2011
3.7 / 5 (72) 8 | with audio podcast