Science - AP

GENEVA - Scientists running the world's largest atom smasher used the $10 billion machine's accelerator to speed up proton beams for the first time Tuesday, in a step toward experiments about the makeup of the universe.

STRASBOURG, France - Global warming cannot be reversed unless the United States and China commit to meaningful cuts in their greenhouse gas emissions, the EU said Tuesday.

GENEVA - The number of people worldwide infected with the virus that causes AIDS — about 33 million — has remained virtually unchanged for the last two years, United Nations experts said Tuesday.

CAPE CANAVERAL, Fla. - The astronauts aboard the orbiting shuttle-station complex are resting after their three successful spacewalks.

GENEVA - Greenhouse gases in the Earth's atmosphere reached record highs in 2008, with carbon dioxide levels increasing faster than previously, the U.N. weather agency said Friday.

WASHINGTON - Since the 1997 international accord to fight global warming, climate change has worsened and accelerated — beyond some of the grimmest of warnings made back then.

NEW ORLEANS - The creatures living in the depths of the ocean are as weird and outlandish as the creations in a Dr. Seuss book: tentacled transparent sea cucumbers, primitive "dumbos" that flap ear-like fins, and tubeworms that feed on oil deposits.

LONDON - A leading climate change scientist whose private e-mails are included in thousands of documents that were stolen by hackers and posted online said Sunday the leaks may have been aimed at undermining next month's global climate summit in Denmark.

LONDON - Computer hackers have broken into a server at a well-respected climate change research center in Britain and posted hundreds of private e-mails and documents online — stoking debate over whether some scientists have overstated the case for man-made climate change.

KONSTANTINOVKA, Ukraine - Vladimir Gapor is a plumber by trade, but now he's a scavenger, prying bits of scrap steel from the ruins of his old factory and selling them for a pittance.

DHAKA, Bangladesh - The mother who gave up conjoined Bangladeshi newborn twins for adoption said Saturday she is overjoyed the toddlers have been successfully separated and wants them to grow up in Australia.

MELBOURNE, Australia - The mother of recently separated conjoined Bangladeshi twins does not want custody of the daughters she gave up for adoption and wants them to have new lives in Australia, newspapers reported Saturday.

LINCOLN, Neb. - The University of Nebraska's governing board on Friday voted not to place tighter restrictions on embryonic stem cell research than those outlined under federal guidelines, which were expanded after President Barack Obama took office.

TRAVERSE CITY, Mich. - Asian carp may have breached an electronic barrier designed to prevent the giant invaders from upsetting the ecosystem in the Great Lakes and jeopardizing a $7 billion sport fishery, officials said Friday.

A space shuttle is no tinker toy. But is it the most complex machine ever built?

WASHINGTON - A 20-foot-long crocodile with three sets of fangs — like wild boar tusks — roamed parts of northern Africa millions of years ago, researchers reported Thursday. While this fearsome creature hunted meat, not far away another newly found type of croc with a wide, flat snout like a pancake was fishing for food.

MARIETTA, Pa. - In a Nov. 18 story about the vaccine industry, The Associated Press misspelled the surname of a government official quoted in the story. The director of the federal Biomedical Advanced Research and Development Authority is Robin Robinson, not Robertson.

LONDON - The battle against global warming could be helped if the world slowed population growth by making free condoms and family planning advice more widely available, the U.N. Population Fund said Wednesday.

BANGKOK - Conservationists searching for one of the world's most endangered crocodile species say they have found dozens of the reptiles lounging in plain sight — at a wildlife rescue center in Cambodia.

NEW DELHI - Thousands of stargazers across Asia stayed awake overnight to catch a glimpse of what was advertised as an intense Leonid meteor shower, but the show fizzled rather than sizzled for many because of cloudy conditions.

MARIETTA, Pa. - Malaria. Tuberculosis. Alzheimer's disease. AIDS. Pandemic flu. Genital herpes. Urinary tract infections. Grass allergies. Traveler's diarrhea. You name it, the pharmaceutical industry is working on a vaccine to prevent it.

WASHINGTON - Pollution typically declines during a recession. Not this time. Despite a global economic slump, worldwide carbon dioxide pollution jumped 2 percent last year, most of the increase coming from China, according to a study published online Tuesday.

The Sept. 19, 2008, failure of the Large Hadron Collider is costing 40 million Swiss francs ($40 million) to fix and it set back experiments for more than a year. But the world's largest atom smasher has lesser hiccups to contend with:

KOKONOGI, Japan - A blood-orange blob the size of a small refrigerator emerged from the dark waters, its venomous tentacles trapped in a fishing net. Within minutes, hundreds more were being hauled up, a pulsating mass crowding out the catch of mackerel and sea bass.

BRUSSELS - The EU Commission says over 45 countries who catch tuna have agreed to cut catches of the threatened Atlantic bluefin tuna next year.

LOS ANGELES - The lunar dud for space enthusiasts has become a watershed event for NASA.

LOS ANGELES - For NASA's stuck Mars rover, the Spirit may be willing, but the wheels could prove too weak. The space agency on Thursday outlined a rescue plan to try to free the rover Spirit, which has been bogged in a sand trap on the red planet for half a year. The risky operation is expected to last several months.

WASHINGTON - Record high temperatures are occurring more than twice as often as record lows.