Last ice age quiz: How much do you know about Earth's frosty past?
When you purchase through data link on our internet site , we may gain an affiliate committee . Here ’s how it works . Throughout much of Earth ’s history , the clime has switched between menses of extreme heat and freezing cold . frigid , frosty periods are characterise by large ice sheets in the Northern Hemisphere , while interglacials are periods when those ice canvass retreat or disappear completely , harmonise to theNational Oceanic and Atmospheric Administration(NOAA ) ....