Antarctic ice cores climate change : Deep beneath Antarctica’s ice, scientists have uncovered something that reads less like a climate record and more like a silent witness to human history.
Locked inside the polar ice caps, specifically the Law Dome and WAIS Divide, are layers of snow and air that stretch back as far as 800,000 years, as per a report. Over time, falling snow compresses into solid ice, trapping tiny bubbles of air and chemical particles that preserve snapshots of the atmosphere from the past.