Meet Archaeopteryx, a rare Jurassic fossil that reveals the link between dinosaurs and birds. The Field Museum is now one of the few places on Earth to see a real specimen of this iconic fossil. Take home a piece of your experience with our souvenir Chicago Archaeopteryx Enamel Keychain! It's a perfect way to remember your visit and bring a little piece of history into your daily life. Size: 2.25" W x 2" H Material: Metal, enamel Field Museum Exclusive