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Mount Everest climbers show survival on record-low oxygen

It's no secret that scaling Mount Everest tests the limits of human survival; more than 200 people have died trying to reach its summit. Today we have new information about just how seriously climbers push their bodies on the world's highest peak: Those who manage to stay alive do so on an amount of oxygen that is so minute it would only be seen, at sea level, in people who were in cardiac arrest or dead.

January 8, 2009 — Jordan Lite

Quantum repulsion could make nano devices even tinier

Of all the puzzling physical effects predicted and explained by quantum mechanics, one of the most counterintuitive is that fluctuations in a vacuum can exert forces on objects—almost as if those objects are getting something from nothing.

January 8, 2009 — John Matson

U.S. students say "yay for science"

Educrats may bemoan the sorry state of American students' performance in math and science relative to their peers overseas, but the kids themselves are enthusiastic about pursuing brainiac careers.

January 8, 2009 — Jordan Lite

CES: New netbooks combine mobility and power

Editor’s note: I will be Twittering and blogging from CES this week. To follow my posts, visit my Twitter page, Scientific American ’s Twitter page and Scientific American.com ’s 60-Second Science blog.

January 7, 2009 — Larry Greenemeier

Which came first--galaxies or black holes?

LONG BEACH, CALIF.—One of the oddities of the universe revealed over the past decade is that galaxies and the giant black holes at their hubs fit together as if they were made for each other.

January 7, 2009 — George Musser

Are fat bums a sign of good health?

Hey, ladies, been spending hours fretting over your beefy bottoms? Perturbed about your pear-shaped bodes no matter how many lunges you do daily? Don't be.

January 7, 2009 — Lisa Stein

"Love hormone" may also help us recognize faces

Oxytocin, a hormone associated with trust and social bonding, also helps people recognize familiar human faces, according to a new study. Researchers say the findings, published today in The Journal of Neuroscience , could shed light on the causes of mysterious neurological and psychological disorders.

January 7, 2009 — Coco Ballantyne

Blog Index

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Why Do Facts Fail?

Deconstructing Denial