Coastal erosion has more than doubled in Alaska – up to 45 feet per year – in a 5-year period between 2002 and 2007 along a 40-mile stretch of the Beaufort Sea, according to a U.S. Geological Survey(USGS) study that says average annual erosion rates along this part of the Beaufort Sea climbed from historical levels of about 20 feet per year between the mid-1950s and late-1970s, to 28 feet per year between the late-1970s and early 2000s, to a rate of 45 feet per year between 2002 and 2007.

Globally, tropical trees in undisturbed forest are absorbing nearly a fifth of the CO2 released by burning fossil fuels, according to a 40-year study of African tropical forests published in Nature.

The researchers says that remaining tropical forests remove a massive 4.8 billion tons of CO2 emissions from the atmosphere each year. This includes a previously unknown carbon sink in Africa, mopping up 1.2 billion tons of CO2 each year.  The African tropical forests – one third of the world's total tropical forest – has trapped an extra 0.6 tons of carbon per year in each hectare of intact African forest, they state.

A congressionally mandated report from the National Research Council finds serious deficiencies in the nation's forensic science system and calls for major reforms and new research. Rigorous and mandatory certification programs for forensic scientists are currently lacking, the report says, as are strong standards and protocols for analyzing and reporting on evidence. And there is a dearth of peer-reviewed, published studies establishing the scientific bases and reliability of many forensic methods. Moreover, many forensic science labs are underfunded, understaffed, and have no effective oversight. 

With its light body made of Kevlar, sleek aerodynamic design and three Olympic-racing wheelchair tires, it looks like something that escaped from the Batcave but it’s actually a school project by a team of six Dalhousie University senior mechanical engineering students.

The ultimate in fuel efficiency, the “Maritime Mileage Machine” will be entered in the 2009 Shell Eco-marathon Americas taking place on April 15 to 18 at the Auto Club Speedway in Fontana, California. The event challenges high school and post-secondary students across Canada, the U.S., Mexico and South America to design and build a vehicle that will drive the farthest using the least amount of energy.

A case report published in PLoS Medicine describes a rare side effect of human fetal stem cell therapy. Ninette Amariglio and Gideon Rechavi from the Sheba Medical Center, Tel Aviv, Israel, and colleagues report the case of a boy with a rare genetic disease, Ataxia Telangiectasia, who underwent human fetal stem cell therapy at an unrelated clinic in Moscow and who, four years after the therapy began, was shown to have abnormal growths in his brain and spinal cord.

Increasing numbers are risking their health just because they want to have a tan, say researchers in an editorial published on bmj.com today.

The authors, led by Michael Evans-Brown from Liverpool John Moores University, argue that while the actual number of people having 'tan jabs' (the drugs Melanotan I and Melanotan II) is unknown, they are easily available via the internet and in some tanning salons and hairdressers. A thriving online community of users exist, the largest of which is Melanotan.org with over 5,000 members.

The Rift Valley fever virus is a mosquito-borne African virus that causes fever in humans, inflicting liver damage, blindness and even death on a small percentage of the people it infects. Rift Valley fever also afflicts cattle, goats and sheep, resulting in a nearly 100 percent abortion rate in these animals. Its outbreaks periodically cause economic devastation in parts of Kenya, Somalia, Sudan and Zimbabwe, and bioterrorism experts warn that its introduction to the United States would cripple the North American beef industry.

Researchers at the University of Texas Medical Branch at Galveston say they have discovered a key tactic that the Rift Valley fever virus uses to disarm the defenses of infected cells.

Introducing 'Natchez', the twelfth release in a series of erect-growing, high-quality, productive, floricane-fruiting blackberry (Rubus L. subgenus Rubus Watson) cultivars developed by the University of Arkansas.

According to John R. Clark and James N. Moore of the Department of Horticulture at the University of Arkansas, the new blackberry is a result of a cross of Ark. 2005 and Ark. 1857 made in 1998. The original plant was selected in 2001 from a seedling field at the University of Arkansas Fruit Research Station in Clarksville, and tested as selection Ark. 2241.

'Natchez' produces large fruit, near 9 grams on average in research trials. Fruit of 'Natchez' are elongated, somewhat blocky, and very attractive with an exceptional glossy, black finish.