CAPE CANAVERAL, FLA. - The military's top-secret version of the space shuttle was launched into orbit on Tuesday for a repeat mystery mission, two years after making the first flight of its kind.
A new study links even small reductions in fine particle air pollution to increased life expectancy. Researchers who compared data from 545 U.S. counties found that a drop in fine particulate matter, known as PM2.5, between 2000 and 2007 corresponded with an average rise in life expectancy of 0.35 of a year. The study, led by researchers at the Harvard School of Public Health, is described as the largest to date to find public health benefits from ongoing reductions in U.S. air pollution levels.
The loss of ice covering Greenland and Antarctica has accelerated over the past 20 years, contributing substantially to sea level rise, said a study conducted by 26 laboratories around the world.
The U.S. birthrate plunged last year to a record low, with the decline being led by immigrant women hit hard by the recession, according to a study by the Pew Research Center.
An area of Arctic sea ice bigger than the United States melted this year, according the U.N. weather agency, which said the dramatic decline illustrates that climate change is happening "before our eyes."
Despite early cooling from La Nina, 2012 is on track to become one of the top 10 hottest years on record, with the U.S. experiencing extreme warmth and Arctic Sea ice shrinking to its lowest extent, the U.N. weather agency said Wednesday.
How did Albert Einstein become a genius? Many researchers have assumed that it took a very special brain to come up with the theory of relativity and other stunning insights that form the foundation of modern physics.
At middle age, a great ape will neither cheat on a spouse nor buy a red sports car on impulse. But researchers have found that chimpanzees and orangutans experience midlife crises just as humans do.
It's evening in the universe. The stars we have are dying, and we're not making new ones the way we used to. A group of British and U.S. astronomers reported that the birthrate of stars in the universe has declined over the last 11 billion years. The universe is only producing stars one-thirtieth as fast as it was at its peak in the lusty primordial days when protogalaxies were colliding and merging, popping with blazing bright new stars.
Many women add soy and fiber to their diet in hopes of preventing the vasomotor symptoms of menopause -- hot flashes and night sweats. But a new study suggests it probably does not help. Researchers studied 1,651 women who had not had a period in three months but had not yet had any vasomotor symptoms. They followed them for 10 years, collecting dietary information and recording instances of hot flashes and night sweats.
Scientists in Alberta have identified a new type of horned dinosaur that looked like triceratops but lived 15 million years earlier. Called xenoceratops foremostensis, it was a 2-ton vegetarian that flourished 80 million years ago, making it the oldest known large-bodied horned dinosaur to be found in Canada. Fossils of xenoceratops were first collected in 1958, but were left unidentified at the Canadian Museum of Nature in Ottawa. Scientists working on a larger project, the Southern Alberta Dinosaur Project, have identified about 10 new dinosaurs, including xenoceratops.