Why do the stars shine so bright? What makes a bluebird so blue? How does a moth help a plant reproduce? Parks are living laboratories where scientists ask questions. They observe and experiment. Learn from interactions of plants and animals in their natural environment. Track the moon and Sun across Earth. Map evidence of human activity. The National Park Service preserves the places and stories of discovery and uses what we learn through science to manage our natural and cultural resources. Explore parks where great discoveries happen all the time.