An Earth globe is provided for studying continental position theories. The globe comprises graphical image representations of a plurality of land masses at locations representing the current position of the land masses on Earth. A plurality of at least a portion of great circle indication lines are graphically marked on the globe that generally correspond to linear portions of geographic features on the globe. Globes having at least one graphically marked intersection zone corresponding to an area within about 5.degree. of defined geographic points are also provided. Methods for marking globes are also described.