The Science Life
DENVER — “I’m a little tired of the cold,” Geoff Hargreaves says with a sigh.
No surprise there: Hargreaves works in a deep freeze — 38 degrees Celsius below zero (−36° F). As curator of the National Ice Core Laboratory, his job is to keep ice cores from Antarctica and Greenland frozen.
These cylinders — which would stretch more than 17,000 meters if laid end-to-end — are precious. They contain records of past climate and atmospheric chemistry, trapped in tiny bubbles that formed thousands of years ago and froze in chronologica