brian0918 writes "Until now, the assumption has been that the rapid spin of a pulsar comes from the spin of the original star. The problem was that this only explained the fastest observed pulsars. Now, researchers at Oak Ridge have shown that the spin of a pulsar is determined by the shock wave created when the star's massive iron core collapses. From the article: 'That shock wave is inherently unstable, and eventually becomes cigar-shaped instead of spherical. The instability creates two rotating flows — one in one direction directly below the shock wave and another, inner flow, that travels in the opposite direction and spins up the core. The asymmetrical flows establish a 'sloshing' motion that accounts for the pulsars' observed spin velocities from once every 15 to 300 milliseconds.'"

saskboy writes "The ET scanning project SETI@Home was wildly popular, and the mock project Yeti@Home much less so, but soon there will be a chance for the enthusiastic amateur astronomer to combine those two scanning techniques and spot explosions on the moon with simple telescope and camera equipment at home." From the article: "'On Dec. 14, 2006, we observed at least five Geminid meteors hitting the Moon,' reports Bill Cooke of NASA's Meteoroid Environment Office in Huntsville, AL. Each impact caused an explosion ranging in power from 50 to 125 lbs of TNT and a flash of light as bright as a 7th-to-9th magnitude star... 'The amazing thing is,' says Cooke, 'we've [caught explosions] using a pair of ordinary backyard telescopes, 14-inch, and off-the-shelf CCD cameras. Amateur astronomers could be recording these explosions, too.'... [NASA will] soon release data reduction software developed specifically for amateur and professional astronomers wishing to do this type of work. The software runs on an ordinary PC equipped with a digital video card. 'If you have caught a lunar meteor on tape, this program can find it.'"

Maggie McKee writes "Astronomers have spotted the brightest supernova ever seen — it is intrinsically two to three times brighter than any previously recorded. It has many characteristics of a type Ia explosion, but has hydrogen in its spectrum, unlike other type Ia's. That suggests that this supernova resulted from the collision of two stars — most likely a white dwarf and a red giant — rather than from an exploding white dwarf. If so, it might affect the interpretation of previous cosmological studies that depend on type Ia 'standard candle' observations, like dark energy. But other astronomers say merger-triggered explosions are probably rare and therefore won't throw a wrench in the works."

don_combatant writes to note that President Bush claimed new powers to search US mail without a warrant. He made this claim in a "signing statement" at the time he signed a postal overhaul bill into law on December 20. The signing statement directly contradicts part of the bill he signed, which explicitly reinforces protections of first-class mail from searches without a court's approval. According to the article, "A top Senate Intelligence Committee aide promised a review of Bush's move."

joshdick writes to point out a NYTimes story on the decertification of Ciber Inc. from testing electronic voting systems. It will come as a surprise to no-one here on Slashdot that experts say the deficiencies of the laboratory suggest that crucial features like the vote-counting software and security against hacking may not have been thoroughly tested on many machines now in use. From the article: "A laboratory that has tested most of the nation's electronic voting systems has been temporarily barred from approving new machines after federal officials found that it was not following its quality-control procedures and could not document that it was conducting all the required tests... The federal Election Assistance Commission made this decision last summer, but the problem was not disclosed then... Ciber... says it is fixing its problems and expects to gain certification soon."

Panaqqa writes "A group of researchers at Boise State University is investigating the theory that there are genome sequences so dangerous they are incompatible with life. Greg Hampikian, a professor of genetics, and his team are comparing all possible short sequences of nucleotides to databases of gene sequences to determine which ones don't exist in nature. The New Scientist reports that the US Department of Defense is interested enough in their work to have awarded them a $1 million grant. I for one am not sure I like the possible directions this research could take."