discovermagazine.com: by Carl Zimmer

Neuroscientists explore the mind’s sexual side and discover that desire is not quite what we thought it was.

On April 11, 1944, a doctor named T. C. Erickson addressed the Chicago Neurological Society about a patient he called Mrs. C. W. At age 43 she had started to wake up many nights feeling as if she were having sex—or as she put it to Erickson, feeling “hot all over.” As the years passed her hot spells struck more often, even in the daytime, and began to be followed by seizures that left her unable to speak. Erickson examined Mrs. C. W. when she was 54 and diagnosed her with nymphomania. He prescribed a treatment that was shockingly common at the time: He blasted her ovaries with X-rays. [ more ]

wired.com: By Jonah Lehrer

A revolution in the science of social networks began with a stash of old papers found in a storeroom in Framingham, Massachusetts. They were the personal records of 5,124 male and female subjects from the Framingham Heart Study. Started in 1948, the ongoing project has revealed many of the risk factors associated with cardiovascular disease, including smoking and hypertension. [ more ]

newscientist.com: by Anil Ananthaswamy

Champions of free will, take heart. A landmark 1980s experiment that purported to show free will doesn’t exist is being challenged.

In 1983, neuroscientist Benjamin Libet asked volunteers wearing scalp electrodes to flex a finger or wrist. When they did, the movements were preceded by a dip in the signals being recorded, called the “readiness potential”. Libet interpreted this RP as the brain preparing for movement. [ more ]

wired.com: By Katie Drummond

The military’s got spy drones and surveillance cameras all over Afghanistan, and they’re looking to add even more. But the heaps of footage are already more than analysts can handle. Now, the Pentagon’s launching a a new effort that will use computer programming to help human analysts and improve the speed and accuracy of spy-cam threat detection — even when there’s only “weak evidence” of an impending attack. [ more ]

newscientist.com: Catherine Brahic

[ more ]
(environment, green, culture, uncharacterized)

sciam.com: By David Biello
Molten salts can store the sun’s heat during the day and provide power at night

Near Granada, Spain, more than 28,000 metric tons of salt is now coursing through pipes at the Andasol 1 power plant. That salt will be used to solve a pressing if obvious problem for solar power: What do you do when the sun is not shining and at night?

The answer: store sunlight as heat energy for such a rainy day.

Part of a so-called parabolic trough solar-thermal power plant, the salts will soon help the facility light up the night—literally. Because most salts only melt at high temperatures (table salt, for example, melts at around 1472 degrees Fahrenheit, or 800 degrees Celsius) and do not turn to vapor until they get considerably hotter—they can be used to store a lot of the sun’s energy as heat. Simply use the sunlight to heat up the salts and put those molten salts in proximity to water via a heat exchanger. Hot steam can then be made to turn turbines without losing too much of the original absorbed solar energy. [ read more ]

sciam.com: By Mark Fischetti

Tracking packages and food sources would lead to faster recalls and lessen contamination risks

If a natural pathogen, or a perpetrator, contaminates food, lives will be saved if the tainted product can be quickly detected, then traced back to its point of origin so the rest of the batch can be tracked down or recalled. The following technologies, in development, could help:

Microfluidic Detectors—Botulinum bacteria produce the most poisonous toxin known. They and similar agents, such as tetanus, could be detected during food processing by microfluidic chips—self-contained diagnostic labs the size of a finger. The University of Wisconsin–Madison is crafting such a chip, lined with antibodies held in place by magnetic beads, that could detect botulism during milk production. The chip could sample milk before or after it was piped into tanker trucks that leave the dairy and before or after it was pasteurized at a production plant. Other chips could detect other toxins at various fluid-processing plants, such as those that produce apple juice, soup or baby formula. [ read more ]

newscientist.com:

AFTER 25 years battling the mother of all viruses, have we finally got the measure of HIV? Three developments featured in this issue collectively give grounds for optimism that would have been scarcely believable a year ago in the wake of another failed vaccine and continuing problems supplying drugs to all who need them.

Perhaps the most compelling hope lies in the apparent “cure” of a man with HIV who had also developed leukaemia. Doctors treated his leukaemia with a bone marrow transplant that also vanquished the virus (see “One shot to rid body of HIV”). Now US company Sangamo Biosciences is hoping to emulate the effect using gene therapy. If it works, and that is still a big if, it would open up the possibility of patients being cured with a single shot of gene therapy, instead of taking antiretroviral drugs for life. [ read more ]

discovermagazine.com: by Karen Wright

“Survival of the fittest” is helping us understand not only the origin of species but also love, politics, and even the cosmos.

You could call Helen Fisher a Darwinian matchmaker. The acclaimed anthropologist from Rutgers University is also a best-selling author of books on love and the chief scientific adviser to an online dating service called Chemistry.com. This service utilizes a questionnaire that Fisher developed after years of research on the science of romantic attraction. It reveals which of four broad, biologically based personality types an applicant displays and helps identify partners with compatible brain chemistry. In designing the questionnaire, Fisher relied on the principles of evolutionary psychology, a field inspired by Charles Darwin’s insights. She has even used those principles to size up Darwin himself. (He is a “negotiator,” “imaginative and theoretical,” “unassuming, agreeable, and intuitive”—but also married, alas, and dead.) [ read more ]

wired.com: Regina Lynn

It’s the ultimate revenge of the nerds as product developers use their big brains to create sex machines that kick pleasure into overdrive. In fact, the very nature of the sex “toy” is changing as a new generation of sex-positive engineers infiltrates the industry.

From the smooth, silent glide of the Monkey Rocker Tango to Le Chair’s ability to put two people into a dozen compromising positions, the new products and prototypes unveiled at this week’s Adult Novelty Expo straddle the line between toy (a passive, frivolous object) and machine (a substantial apparatus that inspires commitment and even emotional attachment).

Here are some of the most interesting. [ read more ]