• 

  A scientist setting up wildlife cameras and monitoring vegetation in a sprawling national park, with a clipboard and GPS device in hand

• 

  A ranger guiding a group of hikers through a national park, pointing out wildlife and plants while carrying a field kit

• 

  A park ranger giving a tour to excited visitors, pointing out wildlife tracks on a dirt trail in a national park

• 

  The Grand Canyon, with its layers of rock revealing millions of years of geological history