Science in the National Park! FREE! There is so much science to celebrate in the birthplace of our country! Attendees will have the opportunity to explore the connection between history and science at Independence National Historical Park, with activities geared to a fourth and fifth-grade audience. Come ground-truth satellite data for NASA! We'll show you how to use the NASA GLOBE Observer app to calibrate your phone, identify clouds (from Earth...satellites take pictures from the other side of the clouds), measure tree height, confirm the land type under your feet, and identify zika-carrying mosquitos! Yup, you can do all of this and more through one app!