Preface -- 1. History and Description of Ice Ages -- 2. Variability of the Earth's climate -- 3. Ice core methodology -- 4. Ice core data -- 5. Ocean sediment data. etc.It is not so long ago (a mere 17,000 years – a blink in geologic time) that vast areas of the Northern Hemisphere were covered with ice sheets up to two miles thick, lowering the oceans by more than 120 m. By 11,000 years ago,…