Scientists working with the Center for Oldest Ice Exploration (COLDEX) have collected the oldest directly dated ice cores ever drilled: 6 million years old.

Scientists discover oldest air on record trapped in 6-million-year-old Antarctic ice

Source: space
Source Link: https://www.space.com/astronomy/earth/scientists-discover-oldest-air-on-record-trapped-in-6-million-year-old-antarctic-ice