The Netherlands allows medically assisted euthanasia for extreme mental suffering. Some doctors question the guardrails.

The first of five large dam projects under consideration has been approved, despite environmental and social costs.

More than three years have passed since federal health officials arrived in central Appalachia to assess an alarming outbreak of HIV spread mostly between people who inject opioids or methamphetamine.

Biostatistician Jeffrey Morris says effective dialogue requires an awareness of how politics shape a person's beliefs.