...Extreme temperature variations have occurred on Earth during the last few million years because of its extended Ice Ages which included brief warm periods that continue until now. Researchers conduct their studies on climatic patterns to forecast upcoming climate variations that will occur during the next several hundred years. Earth maintains a constant temperature throughout time. The planet follows natural cycles which repeat approximately every 100000 years throughout its history of millions of years. The planet spends most of its time in a Glacial Period which lasts through Ice Ages except for brief warming periods that last 10000 to 15000...