1. Winds howl across Venus at super-fast speeds that can reach 450 mph (724 kph) in its middle cloud layer.
  2. White tigers are prone to having crossed eyes (strabismus).
  3. Zippers became popular during the Great Depression, because buttons were considered too costly.
  4. As recently as 2012, new stretches of the Great Wall of China have been discovered around the border of present day Mongolia.
  5. The stones at Machu Picchu fit so tightly together that not even a knife's blade could fit between them.
  6. Spotted hyenas sometimes scavenge, but, contrary to popular belief, they kill 95% of their food.
  7. About 90% of the world's earthquakes occur along the Ring of Fire, an area in the basin of the Pacific Ocean.
  8. It is estimated that 25–30% of suicides are accompanied by a note.
  9. The largest free rock concert ever had 4.2 million people. It was held by Rod Stewart in Rio de Janeiro, Brazil.
  10. The First YouTube Video was uploaded on April 23, 2005, featuring its co-founder Jawed Karim at the San Diego Zoo.
  11. While most of the Amazon rainforest is in Brazil (60%), it's also in Peru (13%), Colombia (10%), Venezuela, Ecuador, Bolivia and three countries.
  12. The "Territorio De Zaguates" (Land of the Strays) in Costa Rica is a huge no-kill dog shelter where you can hike for free with the dogs.
  13. Of the 8 species of bears, the polar bear is mostly carnivorous, the giant panda feeds almost entirely on bamboo and the remaining six species are omnivorous with varied diets.
  14. There is a secret swimming pool in the Mojave Desert that anyone who finds it can use.
  15. Facebook co-founder Eduardo Saverin renounced his U.S. citizenship to avoid paying US$700 million in taxes.
  16. 7% to 10% of Arabs are Christians.
  17. The four highest mountains on Earth, Everest, K2, Kanchenjunga and Lhotse, were first scaled in 1953, 54, 55, and 56.
  18. The demand for currency was so low during the Great Depression, the U.S. mint halted the production of nickels between 1932-33.
  19. If it were a country, California would be the 8th economy in the world and the 35th most populous.
  20. Brazil has been the largest producer of coffee for the last 150 years.
  21. In Islam, the Bible is considered a revelation from God which had been corrupted by men. The Qur'an from Muhammad came to correct this deviation.
  22. Australia was inhabited by indigenous people for about 50,000 years before the British came.
  23. About 1 in 6 Jews killed in the Holocaust died at Auschwitz.
  24. Apple's brand is worth US$118.9 billion. It is the world's most valuable brand.
  25. Although myths and speculation about a Terra Australis ("Southern Land") date back to antiquity, Antarctica was only first sighted in 1820 by a Russian expedition.
  26. There is an annual conference on "boring things". In the past people have given talks on barcodes, sneezing and the sounds of vending machines.
  27. 93% of dogs and 75 % of cats that go missing in the U.S. are returned safely, a study found.
  28. Out of 46,000 discovered species of spider, only a single one has been found to be a herbivore.
  29. D-Day was originally set for June 5 but had to be postponed for 24 hours due to bad weather.
  30. Cockroaches are served fried in China, Thailand and other Asian countries.
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