Ice dating back 1.2 million years taken from 3-km depth in Antarctica, called 'time machine'

Scientists have extracted a 9,186-foot-long block of ice, dating back 1.2 million years, from a depth of 2.8km in Antarctica which is likely the world's oldest ice. Scientists are calling the ice block a "time machine" that records an "archive of Earth's climate". "The air bubbles trapped within ice core provide a direct snapshot of past atmospheric composition," they said.