There are more incredibly pointless and delightfully entertaining things to discover in this new entry in the #1 New York Times bestselling series. You probably never knew... . Ronald Reagan is the only president who has been divorced. . It is estimated that half of the world's spider species have yet to be discovered. . November 15 is National Clean Out Your Refrigerator Day. And did you really ever have to know... . The whiskers on a harbor seal are known as "vibrissae"? . Modern scholars believe Isaac Newton may have had Asperger's syndrome? . In the 1920s, Hollywood made twice as many films a year as it does today? There are more incredibly pointless and delightfully entertaining things to discover in this new entry in the #1 New York Times bestselling series, a must-have for trivia enthusiasts and a perfect white elephant gift. You probably never knew... . It is estimated that half of the world's spider species have yet to be discovered. . November 15 is National Clean Out Your Refrigerator Day. And did you really ever have to know... . The whiskers on a harbor seal are known as "vibrissae"? . Modern scholars believe Isaac Newton may have had Asperger's syndrome? . In the 1920s, Hollywood made twice as many films a year as it does today?