People Earth The ice keeper The Science Life By Alexandra Witze May 2, 2013 at 4:05 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print DENVER — “I’m a little tired of the cold,” Geoff Hargreaves says with a sigh. Vasileios Gkinis of the University of Colorado Boulder examines layers in an ice core that reveal environmental changes over time. Gifford Wong/Wais Jeff Kanipe No surprise there: Hargreaves works in a deep freeze — 38 degrees Celsius below zero (−36° F).