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Since that meeting, much has changed, but the fundamental problem of developing an effective AIDS vaccine remains. On the positive side, in 2009, scientists announced that they had developed the first vaccine to show any effect against HIV infection - although that effect is, by all measures, modest. The vaccine's ability to reduce the risk of new HIV infection 31% is nowhere near the 70% to 90% that public-health experts normally view as a minimum threshold for an infectious-disease vaccine. Even further behind in development, but still promising, are two new antibodies identified by a group of researchers...
Continually easing the pain of jobless Americans, it turns out, can contribute to high jobless rates by warping incentives to look for work. "The consensus estimates show that unemployment benefits do prolong unemployment spells by quite a bit," says University of Chicago economist Bruce Meyer, who has produced academic studies on the issue dating back to the recession of the early 1980s. (See 10 ways your job will change...
...here's the catch: past studies by academics such as Meyer and Harvard's Lawrence Katz show that people are most likely to find a job just as their unemployment benefits run out. Many people use that thin cushion to wait until the last minute to act. They pass up lower-paying, less desirable jobs, or they avoid moving to take a job. Adds Davis: "Surveys show people are very pessimistic about this labor market and their job prospects, and they think it's not worth the effort to look. The generosity of benefits makes it easier to take that...
CONAN O'BRIEN, refusing to accept NBC's plan to push back the start of The Tonight Show to accommodate a new Jay Leno show...
JENNY CLACK, a paleontologist at Cambridge University in England, on a set of fossilized footprints found in Poland that show four-legged animals on land nearly 400 million years ago, well before the date scientists had given for animals' emergence from...