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註釋It was during the Ice Age that today's world took shape. It was then that many of the animals that share our world - including our own species Homo sapiens - evolved, while others were driven to extinction. These developments took place against the background of a climate that see-sawed between cold and warm, and the advance and retreat of huge ice sheets, which shaped the British landscape. If we think beyond the short term, we are still living in the Ice Age. Understanding its changing climates, environments and inhabitants is essential to understanding today's world and some of the challenges that we face. --