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

Voyage of the DNA Treader

Richard Feynman was right: there is plenty of room at the bottom, and the beeping, lumbering trashcans of 1950s science fiction are gradually giving way to micro-droids the size of a speck of dust . . . or even a molecule.

Dec 30, 2010
4.2 / 5 (9) 1 | with audio podcast

New scenery at Earth's core-mantle boundary found

(PhysOrg.com) -- Using a diamond-anvil cell to recreate the high pressures deep within the earth, researchers at the California Institute of Technology (Caltech) have found unusual properties in an iron-rich magnesium- and ...

Sep 02, 2010
5 / 5 (4) 4 | with audio podcast

A Mine for Dark Matter

(PhysOrg.com) -- Deep in a mine 230 stories underground, physicists are trying to detect dark matter, the mysterious stuff that makes up nearly a quarter of the universe. Last December, tantalizing rumors ...

Jun 23, 2010
4.4 / 5 (8) 7 | with audio podcast