As many here in the United States suffer through the worst cold in recent memory (-10 F/-23 C here in Ohio), just remember that life on Mars’ southern polar ice cap would be much worse! The European Space Agency’s Mars Express Orbiter recently captured magnificent images of the huge, white ice swirls at the bottom of the Red Planet. In the winter, as temperatures fall to around -153 Celsius (-243 F), carbon dioxide freezes, forming a few-meter-deep layer of dry ice. When the winter ends and sunlight strikes the dry ice, it transforms into gas, creating massive winds that travel at 250 mph (400 kph). In the future, terraforming could melt the southern polar ice cap to create a vast amount of liquid water.