Ice Remained Even During Warmest Epoch

Livescience notes that even during the warmest period we can determine while life lived on Earth, during the Cretaceous Thermal Maximum 91 million years ago there was still an ice cap at the South Pole. During this period the temperature in tropical seas was up to 12 degrees Fahrenheit warmer than today. While there was still ice in the deep south, the northern arctic latitides were the home of heat loving crocodiles.