Michael O'Hearn

• el Dorado Map
• Design of a statewide ground-water monitoring network for Illinois
• How Spirit Dog made the Milky Way
• Jake Burton Carpenter and the Snowboard
• Read-it! Readers
• Allosaurus vs. Brachiosaurus
• Awesome Space Robots
• Deinonychus vs. Styracosaurus
• Dilophosaurus vs. Ankylosaurus
• Dinosaur Wars Pack a Of 4
• Ghosts vs. Witches
• Henry Ford and the Model T