Gazing down on the spectacular view from a mountaintop can take your breath away. That breathlessness is oftentimes more than just an awestruck reaction to the sights. It can be a symptom of altitude sickness, an illness that can strike hikers, mountain climbers, skiers, and anyone who hits the 8,000-foot mark on a mountain. Learn more about this condition by taking this true-false quiz.
A physician-owned hospital.