Fuel from algae is being sold in California, a first step toward a future of advanced biofuels. David Biello reports

Patients know that health care workers should wash their hands, but are are often reluctant to ask a doctor or nurse to lather up. Katherine Harmon reports

Climate isn't the only thing global warming will change. David Biello reports

Just a couple of hours of physical activity each week adds years to average life expectancy. Katherine Harmon reports

A survey of environmental groups finds that Teddy Roosevelt was the president with the highest environmental cred, followed by Richard Nixon. David Biello reports

The U.S. east coast is enduring what's been dubbed a "Frankenstorm" for its combination of multiple different types of weather systems. David Biello reports

Man-made earthquakes are a real and growing phenomenon. David Biello reports

A small study finds that sleep-deprived fat cells are less sensitive to insulin, a condition that often precedes diabetes. Katherine Harmon reports

The bright lights of the big city currently rely on fission, but a new study suggests efficiency and renewables could do the job instead. David Biello reports

Young adults at risk for getting a sexually acquired infection were more likely to use a condom if they followed a social media's sex education campaign. Katherine Harmon reports