For example, the mammoth, which fell extinct between 9,000 and 12,000 years ago, was, according to Cotterell, once a tropical animal, yet their remains are found mostly in what are now cold areas like Siberia and Alaska, showing that the climate in these areas changed abruptly and drastically.
例如大約在距今 1 萬 2,000 年～9,000 年前神秘滅絕的長毛象，原本源自非洲，屬於熱帶動物，然而其大量埋身處（長毛象塚）卻是如今天寒地凍的西伯利亞、阿拉斯加等，顯示這些地方氣候鉅幅且驟然改變的驚人變化。