To stay cool in hot temperatures, kangaroos lick their arms until the fur and skin are sopping wet. The wind hitting their arms causes the saliva to evaporate and cool them off.

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The world's largest mountain range is under the sea.

Mount Everest or Kilimanjaro are likely the massive mountains you know by name. But if you're looking for the longest mountain range on Earth, you'd need to check out the mid-ocean ridge, which the National Ocean Service reports stretches for 40,389 miles, with 90 percent of it under the sea.

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The Sodium Lauryl Sulfate in toothpaste suppresses sweetness receptors, which is why juice tastes so bad after brushing your teeth.

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Mexico is the world's fattest country. About 73% of the Mexican population is overweight.

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France shares its largest border with Brazil. The border is located between the Brazilian state of Amapá and the French region of Guyane. It is 730 kilometres (450 mi) in length.

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Before rubber erasers became a thing, people in the 1770's used balled up, moistened bread to erase pencil marks.

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Kim Un Young - the smartest person in the world entered university at the age of 4. At the age of 7, he received an invitation to work at NASA. By the age of two, he already spoke 5 languages.

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The modern doorknob was invented in 1878 by 16 year old African American inventor called Osbourn Dorsey

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The World's Most (And Least) Powerful Passports.

No. of countries passport holders can visit visa-free:
Japan - 193
Singapore - 192
South Korea - 192
Spain - 190
Germany - 190
Finland - 189
Italy - 189
Luxembourg - 189

Least Powerful Passports:
Pakistan - 32
Syria - 30
Iraq - 30
Afghanistan - 27

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Giraffes used to be called "camelopards", because medieval Europeans once believed them to be mythical hybrid creatures that were born from the union of a leopard and a camel. As such, giraffes are still called "camelopards" in European heraldry.

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Crows in captivity can learn to speak better than parrots.

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During the middle ages it was believed that ringing church bells during thunderstorms would keep lightning away. The practice was abandoned after more than 100 bell ringers were killed by lightning. European records indicate 133 bell-ringers were killed by lightning in the early 1400s.

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The British Pound is the oldest currency in the world, it has been used for over 1,200 years and dated back to Anglo-Saxon era. Back then it was equivalent to 1 pound of silver. One pound back then could buy you 15 cows.

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The first Pablo Picasso documented self-portrait in 1896 when he was only 15 years old, and his last known self-portrait, drawn on July 3rd, 1972, when he was 90 years old."

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