National Park Service
Glaciers and Water
Explore the amazing power of glaciers with a hands-on earth science experiment! After first learning basic background information, learners go on to create their very own chunks of frozen water and gravel in order to observe first-hand...
It's About Time
Paleoclimates
How do scientists know what the Earth was like in the past? This second installment of a six-part series focuses on paleoclimates and provides an overview of how geologists determine information about past climates using fossil pollen,...