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...came to have different masses as the universe cooled (in the moment after the Big Bang, of course, nothing had mass, existing instead in a sort of naked, ethereal beauty). Extrapolating from Higgs' theory, scientists were able to explain how all particles get their mass - which would explain, in turn, how everything in the universe, from scientists at CERN to the grand Jura Mountains that surround them, comes to have weight. (See "Did a Time-Traveling Bird Sabotage the Collider...
That is, the down-regulation of D2 receptors seems to turn normal desire into compulsion. In Kenny's study, the rats that had been given extended access to junk food for 40 days were later willing to continue seeking fatty foods at the risk of getting a painful electric shock to the feet. Limited-access and chow-only rats, however, were significantly put off by the threat of shock, and stayed away from the junk-food buffet...
...question is, does this data really show that the ubiquity of cheap junk food will turn us all into junkies? Not really. A closer look at certain key elements of this study and of prior research helps clarify who - mouse or man - is most likely to get hooked and who isn't, and why addiction involves a lot more than mere exposure to a substance...
...simple turn of the radio dial, and news of the reconstruction plan dominates Haiti's airwaves. At the U.N. donor conference on Wednesday, the international community pledged more than $5 billion dollars to support Haiti for the next 18 months and almost $10 billion for the next five years. These are enormous figures aimed at transforming the poorest country in the Western hemisphere, which has become even more dire after the catacylsmic Jan. 12 earthquake. But as crucial as the donor news was, many Haitians made homeless by the temblor, like Patrick Nordeuse, 43, have simply tuned out. "I used...
...election; in 1994, it began just three months before Election Day. Only time will tell if the health-reform-inspired wave of hostility to the Democrats will fade by November or if the Republicans will manage to keep the issue alive. For Democrats, the challenge now is to turn the nation's attention back to other concerns, like jobs. That points to another big difference between 1994 and 2010: in 1994 the unemployment rate was just under 6%; right now it's nearly...