Overthinking has a genetic component, but your genes aren't your destiny. Here's what the science actually says about why some people ruminate more than others.
Short-term memory loss in older adults has many causes, from medications and vitamin deficiencies to sleep problems and thyroid issues — some of which are treatable.
Altitude sickness can progress from mild headaches to life-threatening fluid buildup in the lungs and brain. Learn the three stages and what to watch for.