Last November, Bradford G. Smith got a brain implant from Elon Musk’s company Neuralink. The device, a set of thin wires ...

A gum graft treats receding gums and improves the appearance of teeth. Learn when to consider dental surgery, how much it ...

But for busy people, here’s a summary of things you should know about what to do before, during and after an earthquake in Japan. If you’re on public transport: Follow the same guidelines ...