Has always baffled me that humanity lives in such a narrow temperature bandwidth not too far from away from absolute zero (–273.15 degrees). 30 Degree Celsius most consider pretty hot. Minus 20 Degree Celsius pretty freezing. The highest possible known temperature is 142 nonillion kelvins (1032 K.). The closest that scientists think we ever came to this temperature is, unsurprisingly, just after the Big Bang.