Millions of American kids with attention-deficit/hyperactivity disorder, or ADHD, may have a genetic vulnerability to the disease, a new study suggests.

Negative symptoms in schizophrenia can be so disabling that they interfere with a person's ability to attend school, begin a fulfilling career, and even live independently. Scientists suggest a new way to classify the negative symptoms of schizophrenia, which may influence research and treatment in years to come.

Taiwan's pro-independence leader, Tsai Ing-wen, has just over a year to win back public support if she wants to avoid going down in history as the island's first one-term president.

Your phone. In today’s society, it’s hard to picture life without it. It keeps you connected, it keeps you entertained, and it keeps you busy—but one thing it doesn’t necessarily do? Keep you productive.

Long before the Grand Canyon formed, a primitive reptile the size of a baby alligator skittered sideways across the wet sand of an impossibly ancient coastal plain.

A Nevada geology professor says he recently identified fossilized tracks from a reptile along a popular trail in Grand Canyon National Park.

As Taiwanese voters head to the polls to elect city mayors and city and village leaders on Saturday, they will also be voting on 10 referendums that could set the tone for key social issues including marriage equality and changing the country's name for the Olympics.

Taiwan’s pro-independence leader, Tsai Ing-wen, has just over a year to win back public support if she wants to avoid going down in history as the island’s first one-term president.