The normal, or resting, pulse rate in adolescence can range between 50 to 60 beats per minute to as high as 90 to 100. When active, the maximum heart rate for a teen â the highest amount his heart can safely beat per minute â is about 200 to 205. You can obtain the exact number by subtracting your teenâs age from 220.
About. 1  Smithsonian Earth is a commercial-free streaming service that offers unlimited access to original documentaries, short series, and Nature Scenes. Shot in stunning 4K Ultra HD resolution by filmmakers around the world, its programs will bring you closer than ever before to nature's most fascinating animals and wildest locations.
The museum is located on Independence Avenue at 6th Street SW, and admission is always free. Regular hours are 10 a.m. to 5:30 p.m., but the museum stays open until 7:30 p.m. during its extended spring and summer hours (check website for specific dates). The easiest way to reach the museum is via Metrorail or Metrobus. The closest Metro stop is Smithsonian, on the Blue and Orange lines.