Training health care workers to educate young women about intrauterine devices and contraceptive implants leads to significantly fewer unintended pregnancies.

Walking infants are better able to speak and understand their native language — regardless of what language that may be — than crawling infants of the same age.

Emotion expert helps guide Pixar movie on uprooted tween's rush of feelings.

Reserves are likely far smaller than previously thought, and some may have only decades left before running dry.

The hormone klotho, which regulates aging and enhances cognition, offers possible new link between mind and body.

Bioengineers 'put ignition switch onto a handful of the bacteria’s essential genes' to prevent their accidental escape.

Public policy experts see White House taking a back seat to states on immigrant integration in the absence of congressional action.

Consumers appear to cut their medical care spending when deductibles go up, even when it doesn't make any sense.