EcoWatch: The warmest temperature ever recorded in Antarctica may have occurred last Tuesday with a thermometer reading 63.5 degrees Fahrenheit at Argentinas Esperanza Base on the northern tip of the Antarctic Peninsula, according to Weather Underground. The previous record was set the day before at 63.3 degrees at Argentinas Marambio Base on a small islet just off the coast of the Antarctic Peninsula. Prior to this weeks record heat wave for the icy continent, the hottest known temperature in Antarctica...