6 ways America's national parks have dramatically impacted the history of science over the last century

On August 25, 2016, the U.S. National Park Service will celebrate its 100th birthday.

From the founding of the first park - Yellowstone - to today, the park service has protected and preserved large swaths of wilderness, from shorelines to mountain ranges, as well as myriad of historic sites and monuments. And today, the park system expands across 84 million acres, covering 412 sites.

Over the last century, these parks are, and have always been, vital to science by providing living laboratories for research in some of the most intact natural landscapes in the world. In addition, because these natural sites have been managed and studied for nearly a century, there is a huge wealth of archival scientific data available to researchers working in the parks today.

To find out more about the role that national parks have played in the history of science, Business Insider spoke to Tim Walkins, a climate change science and education coordinator at the National Park Service who is working with the US Geological Survey to draw attention to the scientific value of parks. Here are just a few national sites that have been instrumental.