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.
If you take statins to lower your cholesterol, you may also be lowering your risk of death from cancer, new research suggests.
Ancient starlight, emitted by the first stars in the universe, has been detected using the Fermi Gamma-ray Space Telescope.
Five years ago, a report called "Nation Under Siege" illustrated the vulnerability of 31 U.S. coastal cities to flooding. But not just to any kind of flooding -- to the flooding of a permanent kind from sea level rise.
Doctors have long urged people with red hair and fair skin to avoid the sun's ultraviolet rays. Now, a study suggests that those with ginger hair and fair complexions face an elevated risk of the disease -- even when covered up. The study, published online in the journal Nature, suggests that pheomelanin -- the reddish-yellow pigment that gives rise to rusty locks and an inability to tan -- is itself a potential trigger in the development of melanoma, the deadliest form of skin cancer. Researchers discovered that redheaded mice showed almost three times as much damage due to oxidative stress than darker haired mice, leading authors to conclude that pheomelanin itself was the culprit. Evolutionary biologists say that humans evolved fair skin as they migrated to high northern latitudes, where light was less abundant in winter. By having more pheomelanin, fairer-skinned humans were better able to synthesize vitamin D, a process that's activated by sunlight. This function is so important that the trait survived despite the increased cancer risk that comes with it.
With every degree Fahrenheit rise in temperature, the atmosphere can hold 4 percent more moisture. As a result, Sandy was able to pull in more moisture, fueling a stronger storm and magnifying the amount of rainfall by as much as 5 to 10 percent compared with conditions more than 40 years ago, said Kevin Trenberth, a senior scientist at the National Center for Atmospheric Research, a federally funded research and development center. Coupled with higher sea levels -- since 1992, satellites have observed a 2.25-inch rise -- that means more water to surge onshore and penetrate farther. "That may not sound like a lot," he said. But "a small increase in sea level can actually make a big difference."
Earth's largest radio telescope is growing more powerful by the day on Llano de Chajnantor, a plateau high above Chile's Atacama desert, where visitors often feel like they're planting the first human footprints on the red crust of Mars.
In a move that has irked medical groups and delighted patient advocates, states have begun passing laws requiring clinics that perform mammograms to tell patients whether they have something that many women have never even heard of: dense breast tissue.
The ability to recognize faces is so important in humans that the brain appears to have an area solely devoted to the task: the fusiform gyrus.
The long-running detective saga involving one of North America's earliest inhabitants has taken a new twist, with the discovery that Kennewick Man -- the shockingly intact 9,300-year-old skeleton unearthed in 1996 on the banks of the Columbia River -- probably was a visitor to central Washington, not a longtime resident.
For years, virtually every new mother has been sent home from the hospital with a gift bag full of free product samples, including infant formula. Now health authorities and breast-feeding advocates are leading a nationwide effort to ban formula samples, saying they can sway women away from breast-feeding. As of 2011, nearly half of about 2,600 hospitals in a survey by the Centers for Disease Control and Prevention had stopped giving formula samples to breast-feeding mothers, up from a quarter in 2007. Recently, 24 hospitals in Oklahoma agreed to a ban. In Massachusetts and Rhode Island, all hospitals stopped free samples. There's no question that breast-feeding had health benefits, experts say. But do samples tempt mothers who could breast-feed exclusively for the recommended six months to use formula when they're exhausted or discouraged? Studies have had mixed results. People on either side of the sample issue agree that hospitals should support breast-feeding in many ways.
Could eating tomatoes help prevent strokes? A Finnish study suggests that high blood levels of lycopene, unlike those of other antioxidants, could be associated with a significantly reduced risk of stroke. Vegetables, especially tomatoes, are a significant source of lycopene. The analysis in the journal Neurology followed 1,031 men ages 46 to 55, measuring their blood levels of five antioxidants and recording incidents of stroke. Men with the highest lycopene levels were 55 percent less likely to have a stroke than those with the lowest. There was no association between stroke and blood levels of the other four antioxidants -- alpha carotene, beta carotene, alpha tocopherol and retinol. Lead author Jouni Karppi, a researcher at the University of Eastern Finland, said, "The consumption of vegetables is good for your health anyway, in addition to whatever protection it offers against stroke."