QUIZZES & RISK ASSESSMENTS
They fascinate. They repel. Some pose a danger. Most are harmless. And whether they are seen as scary creatures or colorful curiosities, snakes play important environmental roles in the fragile ecosystems of the nation's wildlife areas.
Your target heart rate is the range at which sustained physical activity - running, cycling, swimming laps, or any other aerobic exercise - is considered safe and effective.
Endometriosis is a common condition among women. It affects about 1 in 10 women of childbearing age. Find out if you're at risk for it.