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.
In 2011, the Smithsonian undertook its first-ever capital fundraising campaign. The $1.5 billion effort raised $1 billion at the three-year mark. Smithsonian officials made the campaign public in October 2014 in an effort to raise the remaining $500 million. More than 60,000 individuals and organizations donated money to the campaign by the time it went public. This included 192 gifts of at least $1 million.