Out of sight

Look: Animals in national parks dramatically shift their behavior with humans around

They’re onto us.

Originally Published: 
A wolf walking in Glacier Bay National Park, Alaska
Every year, around 300 million people visit U.S. national parks.
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The 423 parks in the National Park System offer visitors a chance to see landscapes and animals in their natural state — or as close to it as most of us are likely to see.

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