Lucky Spin

Even if you don’t like cats, you should be thankful for their existence. Without our feline friends, the world would be overrun by rats and other disease-bearing rodents in no time. In just one year, a single pair of rats can produce more than 2,000 offspring. Luckily, cats keep these numbers in check.

The earliest known precursor of sunglasses was invented in prehistoric times by the Inuit. They made snow goggles out of walrus ivory that had two narrow slits that reduced the wearer’s exposure to sunlight and protected them from going snow-blind.

The Grand Canyon is incredibly massive and has so many sudden changes in elevation that it creates its own weather. Temperatures and precipitation vary drastically from one part of the canyon to another. The coldest weather station is on the North Rim at the Bright Angel River Station, while the hottest and driest is just 8 miles away at Phantom Ranch!