The above map illustrates the different definitions of the ice edge.

Ice sheets and glaciation - Discovering Antarctica

Piri Reis Map - How Could a 16th Century Map Show Antarctica Without Ice?

Mass and Height Change: Polar Portal

Plot Diagram & Narrative Arc: Definition, Example & Elements

How far south was the ice in north America during the last ice age? - Quora

Columbian Exchange - Bill of Rights Institute

/gallery/Earth/Earth-with-sol

This Massive Map Shows All of the World's Borders by Age

Biomes of the World

Used Book in Good Condition

Maps of the Ancient Sea Kings: Evidence of Advanced Civilization in the Ice Age

Laurentide Ice Sheet, Size, Retreat, Map, & Facts

Arctic Warming 4 Times as Fast as the Rest of the Planet, New Analyses Find - The New York Times

Climate of the Arctic - Wikipedia