What is a Core?Learn more about the cores the JOIDES Resolution drills from the seafloor. The "Hole" Story About Ocean Cores poster Download a Google Earth Overlay About Cores Dinosaur Extinction Core Poster Free Children's Books What are some of the coolest cores ever drilled? Why do scientists study the magnetic minerals in cores? Find out on the What Is A Core-Drill Down sheet. Blog Posts About Paleomagnetism: Paleomagnetism comic Paleomagnetism for Rookies Why Paleomagnetists Rule!