Working overtime may be bad for your heart, according to results from a long-running study following more than 10,000 government employees in London.
The research, published in the European Heart Journal, found that, compared with people who did not work overtime, people who worked three or more hours longer than a normal, seven-hour day had a 60% higher risk of heart-related problems such as death due to heart disease, non-fatal heart attacks and angina.
Researchers warn, however, that there study did not include any private sector employees and cannot be generalized as a result.
A 150 million year old Archaeopteryx fossil, long thought to contain nothing but fossilized bone and rock, has been hiding remnants of the animal's original chemistry, say researchers writing in PNAS. The find provides a chemical link between dinosaurs and modern birds, The authors say.
"Archaeopteryx is to paleontology what Tutankhamen is to archaeology. It's simply one of the icons of our field," said University of Manchester paleontologist Phil Manning. "You would think after 150 years of study, we'd know everything we need to know about this animal. But guess what—we were wrong."
For decades, the consensus among psychologists was that young children adopt an "anthropocentric" stance, favoring humans over non-human animals, when they begin reasoning about the biological world.
But a new study published in Cognitive Development reveals that this style of human-centered reasoning is not universal.
The study included children growing up in an urban setting (Chicago) as well as children from rural Wisconsin, who have more extensive direct contact with the natural world. To examine the influence of culture, the rural community included European-American and Native American (Menominee) children.
Officials from the National Science Foundation (NSF) have announced a new policy designed to increase data sharing among researchers whose work is funded by agency.
By October, 2010, NSF is planning to require that all grant proposals include a data management plan in the form of a two-page supplementary document. The changes are designed to address trends and needs in the modern era of data-driven science, officials say.
The new policy would require grantees to share their data within a reasonable length of time, so long as the cost is modest.
Previous research has found that soda and coffee consumption are associated with risk of colon cancer. But a new review in the Journal of the National Cancer Institute suggests that drinking even large amounts of coffee and sugar-sweetened, carbonated soft drinks is not linked to the disease.
Earlier studies on subject have reached mixed conclusions. Some found that coffee and tea may lower the risk of cancer, while others found that they could increase the risk. Tea, for instance contains anti-oxidants that in theory help prevent cancer but also has polyamines, which in theory promote cancer. Sugar-sweetened soft drinks are associated with weight gain, obesity, and other conditions that are potential risk factors for colon cancer.
Biologists studying a population of lizards on the Bahamas say that competition among the brown anole lizard (Anolis sagrei) is more important than predation by birds and snakes when it comes to survival of the fittest lizard.
The Dartmouth team's results, published in Nature, may also aid efforts to teach the public about evolution.