Photo by samboep

About two million years ago, the land was already formed. One large land area reached out into the Pacific Ocean from the Asian continent. Only the South China, Sulu and Celebes basins remained as seas. But events were taking shape in the earth’s polar region, causing three successive ice ages which lowered sea levels by 100 meters (330 feet). Sheets of ice were forming over the vast areas of the middle latitude of the North American continent and over much of northwestern Eurasia. From these areas, the ice seems to have moved out slowly in all directions, but mostly southward. The ice sheets were formed from snow, which must have fallen in great quantities when the climate was not warm enough to melt it. The ice was so thick that only the highest mountain peaks were visible about it.

Photo by freegreatpicture.com

The ice age consisted of…