Science Education & Policy
An international team of scientists has discovered that the ubiquitous bacteria that causes most painful stomach ulcers has been present in the human digestive system since modern man migrated from Africa over 60,000 years ago. The research, published online (7 February) by the journal Nature, not only furthers our understanding of a disease causing bacteria but also offers a new way to study the migration and diversification of early humans.
A cell of H.pylori, a bacterial pathogen of the human stomach. The curved shape of the cell, and its bundle of flagella which enable it to wriggle…
Expectant parent' desire to see images of their unborn children has given rise to commercial companies offering keepsake ultrasound scans without medical supervision, often referred to as "boutique ultrasonography."
In a special report in this week's British Medical Journal, journalist Geoff Watts considers whether this non-medical use of the technique can be justified.
Improvements in ultrasound technology have transformed antenatal scans from two dimensional black and white images to 3D, 4D and even moving pictures of the unborn child. Expectant parents seeking a CD-ROM or a DVD of their…
The time is ripe for scientific organizations to adopt codes of ethics, according to a scientist and bioethicist from Wake Forest University School of Medicine in the current issue of Science and Engineering Ethics.
"Medical practice and human subject research is influenced by the Hippocratic tradition," said Nancy L. Jones, Ph.D., "but no similar code of ethics has been formalized for the life and biomedical sciences. Like the Hippocratic oath, a code of ethics for the life sciences can provide a continual standard to shape the ethical practice of science."
Jones, an adjunct associate…
In releasing its latest comprehensive report, the Intergovernmental Panel on Climate Change (IPCC) focuses an important spotlight on the current state of the Earth’s climate.
Climate change is just one of the many symptoms exhibited by a planet under pressure from human activities. "Global environmental change, which includes climate change, threatens to irreversibly alter our planet," says Kevin Noone, Executive Director of the International Geosphere-Biosphere Programme (IGBP).
Polar bear on ice. (Image Credit: Dan Crosbie, courtesy of Canadian Ice Service / Environment Canada)
Global…
The first major global assessment of climate change science in six years has concluded that changes in the atmosphere, the oceans and glaciers and ice caps show unequivocally that the world is warming.
The Intergovernmental Panel on Climate Change (IPCC) concludes that major advances in climate modelling and the collection and analysis of data now give scientists “very high confidence” (at least a 9 out of 10 chance of being correct) in their understanding of how human activities are causing the world to warm. This level of confidence is much greater than what could be achieved in 2001 when…
Groundhogs and other hibernators take a very sensible approach to winter: They slip into a state of suspended animation and let the worst of the cold weather pass.
The cold prompts profound physiological changes in these animals, causing their normally fast metabolism to come almost to a stop during winter. With metabolism slowed to a crawl, the animal draws on its fat stores sparingly to make it through the winter.
Hibernation has become the focus of interesting physiological research. A hibernating squirrel's heart may fall from 300 beats per minute to just three per minute. Its oxygen…
Did you know that people living in the Western region of the United States are more likely to become victims of a serial killer than people living in the Northeast? The February issue of Homicide Studies, published by SAGE, is the first to explore research looking at the considerable interstate and regional differences in serial killer activity.
The study led by University of Connecticut Emeritus Sociology Professor James DeFronzo examined male serial killers in the United States from 1970 to 1992 using sociological perspectives long used to understand other crimes.
The study found that…
Researchers at the University of Pennsylvania School of Medicine have discovered that microtubules – components responsible for shape, movement, and replication within cells – use proteins that act as molecular motors and brakes to organize into their correct structure. If microtubules are not formed properly such basic functions as cell division and transport can go wrong, which may have implications in such disease processes as cancer and dementia. The study, published in the January issue of Cell, is featured on the cover of that issue.
Daughter microtubule (red) being formed on mother…
An analysis of 123 schools participating in the National Science Foundation (NSF) Math and Science Partnership (MSP) program shows improvements in student proficiency in mathematics and science at the elementary, middle- and high-school levels over a 3-year period.
The most recent data, for 2004-2005, show continued increases since the MSP program was established in 2002. Students showed the most significant improvements in mathematics proficiency, with a 13.7 percent increase for elementary, 6.2 percent increase for middle-school, and 17.1 percent increase for high-school students. Science…
The number of individuals with Parkinson's disease in 15 of the world's largest nations will double over the next generation, according to a study published in the January 30 issue of the journal Neurology. The study highlights the significant challenge facing countries with rapidly growing economies, particularly in Asia, many of which are ill prepared to meet this impending public health threat.
The growth in chronic diseases such as Parkinson's is one of the unfortunate byproducts of development. Economic growth and the corresponding improvements in health care and education are increasing…