1. Sound travels nearly 15 times faster in iron than through the air.
  2. Human birth control pills work on gorillas.
  3. Contrary to popular belief, ostriches do not bury their heads in the sand to avoid danger.
  4. Rihanna was an army cadet in a sub-military programme, before her musical career.
  5. Rabbits often sleep with their eyes open.
  6. Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
  7. Cold water is heavier
    than hot water.
  8. In 1974, Kim Il-sung took 1,000 Volvo sedans from Sweden to North Korea and never paid for them.
  9. A flea can jump up to 100 times its height.
  10. Earth is the only planet whose name in English is not derived from a Greco-Roman God.
  11. More people are killed each year by bees than snakes.
  12. The word "queue" is the only word in English that is still pronounced the same way when the last four letters are removed.
  13. There's a self-portrait sculpture made from 9 pints (4.2 liters) of the artist's frozen blood.
  14. Sweden pays students
    US$187 per month
    to attend
    high school.
  15. There's a nail polish that detects date rape drugs by dipping a finger into the drink.
  16. The human body literally glows, emitting a visible light in extremely small quantities during the day.
  17. Replacing a person that leaves a company usually costs around one and a half times her salary.
  18. Neanderthals and modern humans coexisted for thousands of years.
  19. Armageddon (Har Megiddo) has already been the site of several historical battles, the last in 1918.
  20. The average toll to pass through the Panama Canal is US$54,000.
  21. If you could watch all of "The Simpsons" episodes without ads nor sleep, it'd take about 8.5 days.
  22. In South Carolina, the maximum sentence for beating your dog is longer than the max sentence for beating your wife.
  23. 65% of smartphone users download zero apps per month.
  24. "Happy hours" are banned in Ireland.
  25. Martha Stewart became a billionaire while she was in prison.
  26. A fifth of all U.S. airlines flights in 2014 arrived late.
  27. 41% of American workers let paid vacation days go to waste.
  28. The world's most expensive musical instrument, a Stradivarius violin, was sold in 2011 for US$15.9 million.
  29. Bobby Leach, the first man to survive going over Niagara Falls in a barrel, later died by slipping on an orange peel.
  30. Abraham Lincoln was a licensed bartender.
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