The world’s glaciers are retreating at a rate faster than any time in recorded history, according to a new study published online in the Journal of Glaciology, according to Alaska Dispatch News.

Thirty-nine researchers with the World Glacier Monitoring Service compiled and analyzed data spanning more than a 120 years. They looked at observations from 2001 to 2010 and compared them with satellite images, field and aerial photographs and even drawings and writings that were produced in previous decades.