Researchers in Oregon reported yesterday that they had created the world's first fully formed, cloned monkey embryos and harvested batches of stem cells from them -- a feat that, if replicated in people, could allow production of replacement tissues or organs with no risk of rejection.
China, South Africa and India host the world's five dirtiest utility companies in terms of global warming pollution, according to the first-ever worldwide database of power plants' carbon dioxide emissions, while a single Southern Co. plant in Juliette, Ga., emits more annually than Brazil's enti...
New satellite imaging has revealed that hurricanes Katrina and Rita produced the largest single forestry disaster on record in the nation -- an essentially unreported ecological catastrophe that killed or severely damaged about 320 million trees in Mississippi and Louisiana.
Some government scientists have complained that officials at the Smithsonian's National Museum of Natural History took steps to downplay global warming in a 2006 exhibit on the Arctic to avoid a political backlash, according to documents obtained by The Washington Post.
Could an elephant-size dinosaur with a skull so thin that a karate chop would have split it in two, teeth it shed once a month and a brain that, yes, was the size of a walnut, ever be considered one of evolution's success stories?
Crucial parts of the brains of children with attention-deficit hyperactivity disorder develop more slowly than other youngsters' brains, a phenomenon that earlier brain-imaging research missed, a new study says.
Researchers at Ohio State University garnered little attention in February when they found that youngsters who lose their virginity earlier than their peers are more likely to become juvenile delinquents. So obvious and well established was the contribution of early sex to later delinquency that the...
Something is stirring deep below the legendary hot springs and geysers of Yellowstone, the first and most famous national park in America -- and home to a huge volcanic caldron.
The decades-long decline in smoking by Americans has stalled for three years, the first time smoking rates have leveled off for that long since the federal government began collecting statistics more than 40 years ago.
Astronomers have discovered a fifth planet orbiting a distant sun, marking the first time that another solar system with that many circling bodies has been found.
You eat carefully, do not smoke, exercise regularly and think you are taking good care of yourself. But if you drive to work in a heavily congested area such as Los Angeles or Washington, the traffic may be undermining your efforts. A new study has found that while Los Angeles residents spend about...
In the decades since young gay men in the United States started dying from a mysterious syndrome in the 1980s, scientists have wondered how and when the AIDS virus arrived. Many scenarios have been proposed, including one early but now-discounted theory that the disease was imported by a promiscu...
