Disappointing results for a promising anti-AIDS vaccine have dealt a major blow to international efforts to stem the spread of the devastating disease.

Goran Jesic, a young mayor with a reputation for investment coups, will sign a deal this week with an Indian company to build an IT park here, yet another win for this tiny Serbian town already hailed as an "economic miracle."

Ambitious plans for big Wi-Fi networks to provide free or low-cost wireless Internet access are being abandoned or scaled back by US cities as the economics of the deals turn out to be more challenging than expected.

Nearly 200 countries have agreed to accelerate the elimination of chemicals that threaten the ozone and exacerbate global warming, the United Nations Environmental Program announced Saturday.

China is worse hit by computer hackers than any Western nation, a Chinese military expert was quoted as saying Saturday in an apparent response to claims it was the source of attacks on US systems.

Thailand, which just ended a five-month ban on the video-sharing site YouTube, now wants to block clips that accuse a top royal adviser of masterminding last year's coup, an official said Saturday.

Generations of studies on vitamin E may be largely meaningless, scientists say, because new research has demonstrated that the levels of this micronutrient necessary to reduce oxidative stress are far higher than those that have been commonly used in clinical trials.

Researchers at UT Southwestern Medical Center have found nearly 350 genes related to female fertility. Their research may open the door to much wider study in the poorly understood field of infertility.

(AP) -- The season premieres of seven Fox Broadcasting shows will be offered on Apple Inc.'s iTunes store for free in the latest example of TV networks using the Web to create interest in their shows.

Fifty years after the launch of the first man-made satellite, the global space industry gathers in India next week to find ways to benefit humanity -- and make money in the process.

Most of the universe -- 96 percent, to be exact -- is made of dark matter and energy whose composition we simply do not fathom, a Nobel laureate told physicists gathered this week to explore the intersection of the infinitely small and the infinitely large.

(AP) -- Microsoft Corp. Chief Executive Officer Steve Ballmer received a pay package valued about $1.3 million for fiscal 2007, a year in which profit at the world's largest software maker topped $14 billion, according to documents filed Friday.

(AP) -- Three spreadsheets containing more than 5,000 Social Security numbers and other personal details about customers of ABN Amro Mortgage Group were inadvertently leaked over an online file-sharing network by a former employee.

Two British clinics are pioneering a procedure that will allow human eggs to be grown in the laboratory from ovarian tissue samples, a newspaper said Saturday.

(AP) -- Birdwatchers are descending on a rural area near this southern Wisconsin community following the sighting of what is believed to be a green-breasted mango, a type of hummingbird commonly seen in parts of Mexico and Central America.

(AP) -- Google Inc.'s stock reached a new high Friday, reflecting Wall Street's renewed faith in the Internet search leader as it introduces new ways for advertisers to reach its steadily expanding online audience.

(AP) -- Chris Crocker has been called "queer," "a human train wreck," the "Britney guy," an androgynous "it" and much, much worse. But how does this 19-year-old Internet phenomenon, known worldwide for his tearful YouTube defense of Britney Spears, define himself?

British health authorities were investigating Friday a suspected new case of foot-and-mouth disease in a control zone and ordered cattle that showed symptoms of the virus slaughtered.

(AP) -- Semiconductor maker Infineon Technologies AG said Friday that it has reduced its stake in Qimonda AG, the memory unit it listed in 2006, raising about $272 million.

Drought-stricken regions of the Amazon forest grew particularly vigorously during the 2005 drought, according to new research.

(AP) -- NASA has replaced a leaky hydraulic seal in space shuttle Discovery's landing gear, and if testing continues to go well, next month's launch will remain on track, officials said Friday.

The head of the Russian space agency Roskosmos said on Friday he hoped a new spacecraft launch site would be built in the Russian far east by 2020 to supplement the Baikonur cosmodrome in Kazakhstan.

Britain has stockpiled enough plutonium to replicate the nuclear bomb attacks on Japan in 1945 thousands of times over, the country's top science academy said Friday.

A growing number of cities have enacted laws that would make wearing saggy or low-slung pants indecent exposure. "It's an interesting question whether these laws would violate the First Amendment as currently understood," says Neil Richards, professor of law at Washington University in St. Louis. "Saggy pants laws form a hybrid case.