Science

A decade ago, scientists showed that the anesthetic ketamine could relieve major depression in hours. Now, two chemical cousins of the drug are entering the late stages of clinical testing.

Research finds that people respond to feelings of disgust by trying to protect themselves from it — and this can quickly translate into self-interested behavior and cheating.

The Obama administration announces a regulation it says is aimed at protecting the country's rivers, lakes and other waterways from pollution. But critics say it's a massive regulatory overreach.

The problem has gotten so bad that some doctors are pondering a "post-antibiotic world." The World Health Organization says countries need to boost surveillance for resistance and develop new drugs.

Many workers like the programs, and employers say they help hold down health insurance costs. But there are legal questions about how far companies can go to encourage participation.