Earth Entered a 56-Million-Year Ice Age, But Something Unexpected Kept Happening - Indian Defence Review

Earth Entered a 56-Million-Year Ice Age, But Something Unexpected Kept Happening Indian Defence Review How 'Snowball Earth' Was A Tug-Of-War Universe Today Earth’s Longest Ice Age May Have Repeatedly Thawed and Refrozen for 56 Million Years ZME Science Earth's history: "Snowball Earth" likely not continuously frozen heise online Volcanoes may have trapped Earth in a 56-million-year ice age Earth.com