Butte College in California hosts a massive solar array, which allows it to produce more electricity than it uses. David Biello reports

People who have trouble understanding health and medical information are more likely to get hospitalized. Katherine Harmon reports

Ecologists document the negative ripple effects of removing top predators from ecosystems. David Biello reports

A new study says high sodium and low potassium intake are the twin culprits in many cardiovascular syndromes. Katherine Harmon reports

Whisper-quiet electric and hybrid cars may need an artificial sound boost to let pedestrians know they're there. David Biello reports

A look at the environmental burden of our favorite summer beverages. David Biello reports

The Nurses' Health Study finds that the risk of death from sudden cardiac arrest in white women can be lowered by 92 percent through lifestyle maintenance alone. Katherine Harmon reports

In the last decade, more than a billion people have seen improved water safety and sanitation. But 800 million are still at risk of water-borne disease. Katherine Harmon reports

Many blood pressure assessments rely on too few measurements in an intimidating environment. Katherine Harmon reports