The 2019 Philadelphia Science Festival culminates in a super-charged, super-fun celebration of science! This FREE event is unlike any other—with dynamic demonstrations, engaging experiments, geeky games, and electrifying entertainment for the entire family. Extending even further along the Benjamin Franklin Parkway this year, this finale event promises to be the ultimate daylong science extravaganza! The Science Carnival is free and no advanced registration is required.Science Carnival Saturday, May 4, 10:00am to 4:00 pm | Benjamin Franklin Parkway︱222 North 20th Street https://www.fi.edu/psf/science-carnival Come ground-truth satellite data for NASA! SciStarter will 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! All of this and more in one app!