Richard Nixon once ordered a nuclear strike on North Korea

More in "Did You Know?" Series

• The dates 4/4, 6/6, 10/10 and 12/12 all fall on the same day of the week every year. They're called doomsdays.
• Your body is the weakest during 3 am - 4 am. This is the time most people die in their sleep.
• One reason men cry less than women is because they have larger tear ducts, preventing their eyes from leaking easily.
• Research has shown that people are happiest at 7:26pm on Saturday evening.
• Water is the only substance that is found naturally on Earth in three forms - liquid, solid and gas.
• There is a type of tree called rainbow eucalyptus tree, whose bark naturally contains various colors.
• To protect paintings from rodents, around 70 cats work at the Hermitage.
• Reindeers are so well-adapted to the Arctic winter, they are more likely to overheat than freeze in the cold.
• According to one survey, men spend nearly a year of their life staring at women.
• Did you know? Drinking alcohol improves your ability to speak a foreign language.
• Condemned Prisoners In Ancient Rome - What Happens To Them?
• Fun Fact About Spotify You Didn't Know Until Now
• The biggest concert in the world
• Iceland has such a low crime rate that tourists sometimes spend the night in empty cells of local prisons who have not fRead more
• You can catch a cold from being cold. (Incorrect: Colds are caused by viruses, not temperature, though cold can lower imRead more
• Tsundoku (Japanese): The act of buying books and letting them pile up in your home without reading them.
• Before the eleventh century, doctors would drink their patients' urine to determine whether or not they had diabetes. ARead more
• How did Instagram got it's name?
• What is night owl syndrome?