AdvertisementShake It Off: Earth's Wobble May Have Ended Ice AgeApril 05, 2012Christopher JoycefacebookEmailA wobbling of the Earth on its axis about 20,000 years ago may have kicked off a beginning to the end of the last ice age. Glaciers in the Arctic and Greenland began to melt, which resulted in a warming of the Earth, a new study says. Above, Greenland's Russell Glacier, seen in 1990. (Gamma-Rapho/Getty Images)