34
POPSSun + Water = Fuel Michael Grätzel, however, may have a clever way to turn Nocera's discovery to practical use. A professor of chemistry and chemical engineering at the École Polytechnique Fédérale in Lausanne, Switzerland, he was one of the first people Nocera told about his new catalyst. "He was so excited," Grätzel says. "He took me to a restaurant and bought a tremendously expensive bottle of wine." In 1991, Grätzel invented a promising new type of solar cell. It uses a dye containing ruthenium, which acts much like the chlorophyll in a plant, absorbing light and releasing electrons. In Grätzel's solar cell, however, the electrons don't set off a water-splitting reaction. Instead, they're collected by a film of titanium dioxide and directed through an external circuit, generating electricity. Grätzel now thinks that he can integrate his solar cell and Nocera's catalyst into a single device that captures the energy from sunlight and uses it to split water.
25
POPS20 of the World's Most Beautiful Libraries For some people it’s castles with their noble history and crumbling towers, for others it’s abandoned factories or lost cities. But for those who enjoy reading, a huge beautiful library is a place of endless pleasure. Meet 20 of the biggest and most beautiful libraries around the globe.
23
POPSWhy the Brain Follows the Rules
Not surprisingly, the threat of punishment made people act more fairly. In the “punishment threat condition” people split the money close to equally. However, when Person B had no recourse, the people given the money acted very differently and gave away, on average, less than 10 percent of the money. When the researchers looked at the brain activity of people playing this simple game, they found a consistent pattern. One region in the frontal lobes, the orbitofrontal cortex, seemed to be responsible for evaluating the potential for punishment. In other words, it figured out whether or not violating the social norm would get us in trouble. A second brain region, the dorsolateral prefrontal cortex, was responsible for inhibiting the natural tendency to keep most of the money (this would be the greedy thing to do) if this action might lead to future punishment. Interestingly, these brain areas only were activated when the threat of punishment came from a real person, and not a compute
20
POPSWhoppi Goldberg: Rape Apologist It wasn't "rape-rape" that Polanski committed, it was the other kind of rape. The less "rapey" kind that's more ok than the full-on "rape-rape" kind of rape.
19
POPSCreating insignificant events -Futuristic art Vincent Callebaut 'work was lately exhibited in Paris ; ;" To believe in the world means to create events, even insignificant ones, that gets out of control, or create new space-times, even in reduced surfaces or volumes"
18
POPSone step closer to building artificial human brain Markram believes that with the state of technology today, it is possible to build an entire rat's neocortex, which is the next phase of the Blue Brain project, due to begin next year. From there, it's cats, then monkeys and finally, a human brain. Markram is banking on Moore's law holding steady, as a computer with the power of the human brain, using today's technology, would take up several football pitches and run up an electricity bill of $3bn a year. But by the time Markram gets around to mimicking a full human brain, computing will have moved on.
16
POPSHe will run, we will win Based on the team’s findings, the Court of Arbitration for Sport (CAS) in Lausanne, Switzerland, has ruled that Pistorius is eligible to participate in International Association of Athletics Federations (IAAF) sanctioned competitions. If he qualifies for the 2008 Beijing games, Pistorius would be the first disabled athlete ever to run against able-bodied athletes in an Olympic event.
Most Pops
see Most Pops
17
Clips
Latest Pops
Latest Comments
Tags
Print
Save
Turn on live update