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Female Australopiths Left Home Once Mature, Males Didn’t

By Ewen Callaway of Nature magazine Fossilized teeth of early human ancestors bear signs that females left their families when they came of age, whereas males stayed close to home. A chemical analysis of australopithecine fossils ranging between roughly 1.8 million and 2.2 million years old from two South African caves finds that teeth thought to belong to females are more likely to have incorporated minerals from a distant region during formation than those from males

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Newly Discovered Microscopic Worm Thrives in Gold Mines a Kilometer Underground

Deep in South Africa's gold mines water can be found in rock fractures, hosting bacteria that off the stone itself and form biofilms on the hard surfaces. Now new samples pulled from these sunless pools show that nematodes--roundworms of varying size that are essentially tubes with a digestive tract and thrive everywhere on the planet--likely graze on these bacterial films, surviving more than a kilometer underground.

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The Fundamental Physical Limits of Computation

Editor's note (6/1/2011): We are making the text of this July 1985 article freely available for 30 days to coincide with the publication of a paper on entropy and quantum systems by Vlatko Vedral. He authored our June 2011 cover story and blogs about his latest work , which discusses the research featured in this 1985 article. A computation, whether it is performed by electronic machinery, on an abacus or in a biological system such as the brain, is a physical process

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Does Quantum Mechanics Flout the Laws of Thermodynamics?

Quantum mechanics is the most successful description of nature known to humans, yet it has many bizarre implications for our understanding of the world. There are phenomena of superposition (objects being in two places at the same time), entanglement (correlations that exceed any classical correlations) and nonlocality (apparent ability for information to travel instantaneously across vast distances)

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New App From Bono’s ONE To Mobilize Activists

The U2 front man is a cofounder of the charity that is now putting every step of activism--from information to calls to politicians to actual protests--in your pocket.

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Cell Phones, Cancer and the Dangers of Risk Perception

May 31, 2011, was a bad day for a society already wary of all sorts of risks from modern technology, a day of celebration for those who champion more concern about those risks, and a day that teaches important lessons about the messy subjective guesswork that goes into trying to make intelligent choices about risk in the first place, for policy makers or for you and me. The International Agency for Research on Cancer (IARC) says radiation from cell phones might cause cancer. OMG!!! Your phone is ringing! Now what?

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Living Interplanetary Space Flight Experiment–or Why Were All the Strange Creatures on the Shuttle Endeavour ?

This morning, the world witnessed the safe landing of the space shuttle Endeavour, after a 16-day mission to the International Space Station. For those of us inhabiting Earth’s more western time zones, we got to watch the landing last night, with no inconvenience, other than having to divert from the Colbert Report. While I did not travel to the Kennedy Space Center for the landing and recovery of the Planetary Society’s experiment known as Shuttle LIFE, my experience was infinitely better than it was the last time that I had an experiment on a shuttle, when I did go to the Cape to attend the landing.

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Will Future Nuclear Power Reactors Be Safer? (preview)

Editor's note: This article appears in print with the title "In Search of the Black Swan." Half a world away from Japan’s stricken Fukushima Daiichi nuclear power plant, deep in the pine forests of Georgia, hundreds of workers are prepping the ground for an American nuclear renaissance they still believe is on the way. Bulldozers rumble across sunken plateaus of fresh, hard-packed backfill that covers miles of recently buried piping and storm drains.

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Hundreds of Rare Saiga Antelopes Die in Kazakhstan (Again)

One year after a mysterious epidemic wiped out 12,000 critically endangered saiga antelopes ( Saiga tatarica ) in Kazakhstan, the ailment has struck again there, this time killing more than 400 animals. [More]

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