Our world is full of surprises, and even a doctor of science can sometimes learn something about it that will amaze him to the core. Among the facts that we will tell you here, you will probably find something to be surprised by! 
It would take about 10^8 atoms arranged in a row to cover the width of a human fingernail, which is approximately 1 centimeter. If the same number of standard wooden pencils were placed end to end, they would circle the equator more than 47 times. 
Penguins have knees. 
For decades, General Electric owned NBC. The three notes of the NBC jingle are the letters G, E, C encrypted in the notes - the first letters of the words that make up the company name. 
The name of the Corgi breed is a translation from the Welsh words for “dwarf dog”: “cor gi”. 
The border between the United States and Canada is the longest land border in the world. 
The ability of humans to smell petrichor (the smell of wet earth from rain) is greater than the ability of sharks to smell blood in the water. 
Sharks appeared on our planet earlier than trees. 
The patent issued for a fire hydrant was destroyed by fire. 
Eugene Aldrin, father of famous astronaut Buzz Aldrin, not only witnessed the Wright brothers' first flight, but also came to watch his son land on the moon. 
Big Bird from Sesame Street was nearly killed in the Challenger explosion. She was supposed to be part of the mission and record space specials to get kids interested in space, but the costume (more than 2.5 meters tall) was too big to fit in the spaceship. 
The shell is part of the turtle's skeleton. 
The lighter was invented before matches. 
In Britain, carousels spin clockwise, while in America they spin counterclockwise. 
Butterflies and moths drink blood and tear fluid with pleasure - it is very nutritious for them. 
Australia is wider than the Moon. 
The population of Madagascar is larger than the population of Australia. 
Cleopatra lived closer to the invention of the iPhone than to the construction of the pyramids. 
The Guinness Book of Records was invented by the Guinness Brewing Company. They decided to publish a verified directory of various facts in order to use it to stop heated debates in bars. 
If a bald eagle loses a feather, it sheds a similar feather on the opposite side of its body to remain perfectly balanced in flight. 
Tom Brady threw more passes at age 40 than he did at age 20. 
Fanta was created by the Coca-Cola Company for the Germans during World War II. America banned all exports to Germany at the start of the war, so Coca-Cola created Fanta, a similar lemonade that only used local German products. 
Elvis Presley's manager launched the sale of souvenirs with the inscription "I hate Elvis" in order to generate income from the singer's haters. 
Manatees have nails on their fins.
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