Over 200 million people live in Nigeria, which is almost twice as many people as the second-most populous African nation, Ethiopia. The book Green Eggs and Ham was written by Dr. Seuss as part of a bet with a publisher that he couldn't write a book only 50 words. (Seuss won.) People used to say "ahoy!" on the phone instead of "hello." The letters J and Q don't appear in the periodic table of elements. St. Elmo's fire, the phenomenon in which a pointed object has a violet or blue glow thanks to electricity in the air, is actually a form of plasma. There are roughly 1.5 billion bugs for every one person on the planet! They're more essential to most of our ecosystems than humans.