Dehydration has long been known to slow physical performance. Now there's evidence that too little water can hurt cognitive performance, too, making complex thinking tasks harder.
The U.S. has the highest maternal mortality rate in the developed world, but California is leading the charge to reverse that trend. Since 2006, the state has cut its rate by more than half.
Etinosa Yvonne Osayimwen wants to show what's going on inside the heads of Nigerian survivors of violence. She layers their portraits with an image that reminds them of how their lives have changed.
This month, Delhi students saw a new course added to their traditionally rigid curriculum. To confront academic pressures linked to India's high suicide rate, public schools are teaching mindfulness.
DNA testing of dogs has become a booming business. But critics say the pet genetics industry is running too wild, and they're calling for it to be reined in.
After an investigation by the Center for Public Integrity and NPR into conflicts of interest in Medicaid decisions about drugs, Arizona's governor added new transparency rules.
The Trump administration says its plan to overhaul the way Medicare pays doctors will save physicians time and paperwork. But critics worry the changes will hurt patients' care and doctors' income.
Synthetic marijuana, known as K2, overdoses are challenging the city's first responders and law enforcement. "Overdoses are happening everywhere," says one delivery driver.
The richness of human vocal communication turns partly on our ability to control pitch, scientists say. Consider the difference you hear between "Let's eat, Grandma" and "Let's eat Grandma."