HUMANS ON EARTH
THIRD ERA
FIRST ERA
SECOND ERA
PANGAEA FORMED
DINOSAURS
CURRENT ERA
ROCKY AND INNUITIAN MOUNTAINS FORMED
CANADIAN SHIELD
LAST ICE AGE
UNINHABITABLE
LONGEST ERA
GLACIERS CARVED LAKES
APPALACHIAN MOUNTAINS FORMED
NORTH AMERICA NEAR EQUATOR
PANGAEA BROKE APART
