What is the hottest air temperature ever officially recorded on Earth — and where did it happen? 118°F in Phoenix, Arizona 134°F in Death Valley, California 129°F in Baghdad, Iraq 122°F in Las Vegas, Nevada None In 2010, the largest hailstone ever recorded in the United States fell in Vivian, South Dakota. About how big was it? Roughly the size of a golf ball Roughly the size of a baseball Roughly the size of a soccer ball — 8 inches across Roughly the size of a beach ball None The fastest wind speed ever measured on Earth came from a 1999 tornado near Bridge Creek, Oklahoma. Roughly how fast were those winds? Around 150 mph Around 220 mph Around 300 mph Around 400 mph None The wettest place on Earth gets so much rain it's measured in feet, not inches. Where is it? The Amazon rainforest, Brazil Mawsynram, India Seattle, Washington The Scottish Highlands None True or false: a single bolt of lightning can be hotter than the surface of the sun. True — about five times hotter False — lightning is cooler than the sun True, but only barely hotter False — they're almost exactly the same None Stumper. What is the coldest natural temperature ever recorded on Earth? Minus 40°F, in Siberia Minus 80°F, in Alaska Minus 128.6°F, in Antarctica Minus 200°F, at the North Pole None Time's up