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In the last 24 hours, two power producers ordered up a gigawatt of solar power. That’s twice the total solar capacity the United States had installed in 2007.
PG&E, a California utility, and NRG, a national independent power producer, announced plans to build 500 megawatts of solar power each. NRG is partnering with Google.org-backed eSolar, a startup incubated by the legendary venture capital firm, Idealab, that is pursuing solar thermal power which uses mirrors to turn liquid into steam that drives a turbine. Meanwhile PG&E will be investing in photovoltaics, which directly convert light into electricity.
The Solar Electric Power Association …

Now you see sadness, now you don’t.
A new study has found that removing just the tears out of pictures of people crying reduces the sadness that viewers perceive in the photos, even though the rest of the expression remains intact. The research subjects said when the tears were digitally erased,
the faces’ emotional content became ambiguous, ranging from awe-filled to puzzlement. 
"One of the startling things is that the faces not only look less sad but they don’t look sad at all. They look neutral," said Robert Provine, the University of Maryland-Baltimore County neuroscientist who led the work. "Any photograph …

More than a year after developing a mysterious neurological disorder eventually linked to their inhalation of aerosolized pig brains, 24 pork plant workers have regained their health.
Their recovery, described Tuesday in a presentation scheduled for the American Academy of Neurology’s annual conference, ends a story that began in November 2006, when three workers at a Quality Pork Processors plant in Austin, Minnesota reported strange and similar symptoms: fatigue, numb and tingling legs, pain, difficulty walking.
Doctors didn’t know what caused the problem, but tests found severe spinal cord inflammation, suggesting an autoimmune disorder: the patients’ immune systems no longer recognize …

Direct connections from brains to computers may someday help free paralyzed people from the constraints of their bodies. They’re already used to reverse deafness and blindness. But as they become more refined, brain-machine interfaces will almost certainly be used for non-therapeutic purposes — and with that expansion comes profound ethical questions.
"Whether these technologies are used in a way that’s in harmony with — or an affront to —  human dignity is the main question," said Adam Keiper, director of the Ethics and Public Policy Center’s program on science, technology and society.
First-generation neuroelectronics are already on the market in …

Antidepressant drugs, already known to cause sexual side effects, may also suppress the basic human emotions of love and romance.
That SSRIs, or selective serotonin reuptake inhibitors — the most common type of antidepressant — cause sexual dysfunction is common knowledge. Of the 31 million adults in the United States who take the SSRIs, about 30 percent are believed to experience sexual dysfunction.
But a new theory suggests that SSRI antidepressants may also subtly alter the fundamental chemistry of love and romance, snuffing the first sparks between two people otherwise destined to become lovers, and preventing couples from bonding.
"There’s every reason …

Nanotechnology will someday change the world, but in the meantime, it may shake things up on Broadway.
Dancing nanotube puppets, and grouchy nano-hating monsters, take center stage in an adorable video made students at UC Berkeley.
"We put a lot of work into making something we hoped would be accessible and enjoyable for everyone we know who doesn’t spend their life studying nanoscience," says Patrick Bennett, a nanotube researcher who directed the video.
Bennett and his friends entered their project into a contest run by the American Chemical Society, and the film has been winning since it was cast into the spotlight …