The peace symbol wasn’t intended to be a blanket anti-war statement. It specifically refers to nuclear weapons and is comprised of the semaphore letters N and D, as in “Nuclear Disarmament.”

It wasn’t until the 1950s that the Japanese used separate words for green and blue. Prior to that the word ao was used for both colors. Even now, a literal translation of the Japanese for “vegetable” is “blue things.”

Scientists believe that dolphins call each other by name. The moniker is a signature whistle uttered by one dolphin, which is mimicked by an acquaintance when in close proximity.

The tiny Alps-locked European principality of Liechtenstein can be rented for $70,000 a night. Options include custom street signs and currency, a huge welcoming ceremony with marching band and accommodations for 150. (The full-time residents are allowed to remain in country.)

Ben Franklin’s electrical work was so pioneering he had to make up words for it. Franklin is thought to have coined the terms “battery,” “conductor” and “electrician.” However, his kite flying escapades are a myth.

Contrary to popular belief, The Great Wall of China is not visible from space. Man-made objects that can be seen from orbit include the great pyramids of Giza, some desert highways and a 64,000-acre complex of greenhouses in Spain.

Add a third person into a duel, and it becomes a “truel.” Calculating the odds of victory becomes much harder, so it is a favorite situation for mathematicians and game theorists to ponder.

The greeting “Yo” predates MTV Raps and even the Rocky film franchise. “Yo” could be heard from sailors and huntsman as early as the 15th century and became common as a roll call response during WWII.