past million years or so. Sometimes this whole period is referred to as the ‘ice age’, although it has included many individual glacial periods that alternated, every hundred thousand years or so, with warm periods called interglacials. More accurately, the ‘last ice age’ refers to the most recent of these glacial episodes.РThe coldest part, when massive glaciers extended as far south as Britain, happened between 25,000 and 20,000 years ago; we call it the last glacial maximum.Рfig2:The congruent relationship between the changes of CO2 and the temperatureРGlacial climate and sea levelРSince 2 million years ago, Earth’s climate has undergone a significant plex evolution. The global weather became hugely unstable during that time. It dramatically switch its warming to cooling and back again.
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