On April 17, Katie Herzog checked into a Boston teaching hospital for what turned out to be a nine-hour-long back surgery.

The 68-year-old consulting firm president left the hospital with a prescription for Dilaudid, an opioid used to treat severe pain, and instructions to take two pills every four hours, as needed. Herzog took close to the full dose for about two weeks.

Then, worried about addiction, she began asking questions.

A potential new treatment for Alzheimer’s disease is being tested on human patients for the first time. The idea, which has close ties to Connecticut, is different to every other approach currently on the market for this still-incurable disease. 

A Washington, D.C., judge has significantly narrowed the Justice Department's warrant related to a website used to plan anti-Trump protests during the Inauguration.

The only known Leonardo da Vinci painting in private hands is heading to auction.

The portrait of Jesus Christ, Salvator Mundi, was only recently confirmed to be a da Vinci. This piece was thought to be a copy of a destroyed original. And it's still not clear where the painting was, exactly, for more than a century.