Sleeping. Everybody needs it. Many of us don’t get enough of it. These are common truths that almost everyone knows. But recently, I had the opportunity to learn quite a bit more about sleep, and how it affects health. I came away convinced that sleep is a

Q&A by Dr. Leslie Kernisan Q: My 88-year-old father lives in his own home about 100 miles from us. He’s been living alone since my mother died five years ago. I thought he looked rather thin last time we saw him. I’m starting to feel worried