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Thousands of teenagers from around the world have submitted a science project to the Google Science Fair . Now it's your turn to participate

For capturing the sun's copious energy, there are basically two available engineering models: photovoltaic (PV) cells that turn it into flowing electrons or photosynthetic plants that turn it into plant food. So which does the job better? After all, such a judgment might help inform whether policymakers pursue biofuels or solar electricity

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May 12 (Reuters) - Heavy flooding in the U.S. Midwest continued to shutOhio River terminals, limited barge movements and threatened to disrupt [More]

The sale of bear bile for use in traditional medicine is rampant throughout 12 Asian countries, despite national and international laws banning or limiting the practice, according to a new report from TRAFFIC International, the wildlife trade monitoring network. Bile, also known as gall, is a fluid produced in the liver and stored in the gall bladder to help with digestion.

Global warming and decades of outmoded fire prevention strategies are merging to set the stage for massive "mega-fires" that scar communities' homes and pocketbooks, according to a new assessment. Preliminary findings from the United Nations' Food and Agriculture Organization (FAO) released this week trace the circumstances around eight mega-fires across the world in a quest to uncover clues on how best to ward them off and minimize their damage.

Imagine that you want to send a secret message to your colleague at the CIA. You can encrypt it to prevent counterspies from reading it

By Roberta Rampton WASHINGTON (Reuters) - A U.S. task force examining the disaster at Japan's Fukushima Daiichi plant expects to find ways to improve safety at the country's 104 U.S. nuclear plants but has not found any major problems in its first 30 days of work

By Ayesha Rascoe WASHINGTON (Reuters) - The U.S. offshore drilling regulator has approved a Royal Dutch Shell plan for deepwater oil and gas exploration in the Gulf of Mexico.

Key concepts Cells [More]

African Anopheles mosquitoes find us by our carbon-dioxide-rich exhalation. But when they get close they turn away from our heads and dive for our feet--apparently their preferred snack spot

Most forms of cancer still must be spotted visually to be diagnosed. But if a newly devised virus can do the job, it could track down cancer cells too small or well hidden to be seen in scans. It might also help shrink tumors , too.

With the market for hybrid automobiles picking up steam , it makes sense for tomorrow's engineers to get a feel for designing and building cars powered by a combination of internal combustion and electricity. Hybrid technology is far from an exact science, however, as student engineers found out last week at the Formula Hybrid International competition held at the New Hampshire Motor Speedway in Loudon, N.H. [More]

By Marian Turner of Nature magazine When a research team started analyzing the genetics of micro-organisms from their university pond, they might have expected to find a couple of new species. [More]