It’s pay-as-you-wish day at the Academy of Natural Sciences on Saturday as the historic museum celebrates its vast collections of dinosaurs, algae, birds, minerals and much more. h

Philly’s Academy of Natural Sciences has 200 years of ‘firsts’ in America’s science communityThe Academy was home to the first mounted dinosaur on display, and was one of the first spots for Philadelphians to celebrate natural science.billypenn.com