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Nails and screws are a different thing.

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I didn't know exactly what a nail was. But it was 못!

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I thought light bulb was invented by Tomas A. Edison, but it wasn't true! It was Humpry Davy.

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I thought the wheel itself was the great invention.

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Edison is not true genius. He invented light bulb with many helps of other scientists.

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I thought the light bulb was invented in 1900's but it was already invented in 1800's.

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I never knew wheels were intvented after metal alloys, canals, sailboats, and even musical instruments. Somehow I thought wheels are way more simple than complicated city constructions and delicate instruments.

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I thought bamboo filament light bulb is intersting. Although bamboo is tree, Edison made bamboo filaments is intersting.

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I've always thought that nails were invented recently, likely after the industrial revolution. Kinda ironically, it's quite funny they took so long to come up with a nail-making machine after the industrial revolution.

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I didn't knew that the first wheel was developed in 4000 B.C.. I thought wheel might developed more earlier.
How could people live without wheels by that time?! How did they move heavy rocks or blocks to make huge structures? After reading this paragraph, I became curious about their lifestyle without wheels.

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The fact that this Joseph Wilson Swan first invented modern, longer lasting light bulbs was really new to me. So Thomas Edison only became popular for making light bulb manufacturing easier?

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I was surprised that until the 1790s and early 1800s, hand-wrought nails were the norm. In fact, I didn't thought deeply about making nails because nails are usually used in making and building something else. Those are materials!
By reading this paragraph, I learned about how the nails were made, and got a chance to realize materials that we usually use also have to be made by someone.

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I thought the axle is important role in the car. It makes the car stable is interesting.

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I thought that Thomas Edison made light bulbs firstly. But, I learned that in 1850 an English physicist named Joseph Wilson Swan created a “light bulb” by enclosing carbonized paper filaments in an evacuated glass bulb.
After I read this paragraph, I wanted to know more about inventions that I knew incorrectly. So I searched more about world's invention, and I was surprised that airplane was first invented by 릴리엔탈(Otto Lilienthal).

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I was surprised about the origin of wheel. Starting from rolling rock is so interested.

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I didn't know that the nail dates back more than 2000 years to the Ancient Roman period

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So far, I've thought that the filaments in the light bulb are just made of metal, but it was a carbonized bamboo!

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I thought nail was so important inventions. I was surprised about making process, hand-wrought nails were the norm, with a blacksmith heating a square iron rod and then hammering it on four sides to create a point.

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It was surprised that it was not made by Thomas Edison.  Made by baboo is also shocked

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I was surprised that the wheel was made before 4000 B.C

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I learned that it was not the Edison who invented the whole light bulb. Scientists such as Humphry Davy and Joseph Wilson backed up the fundamental development of electric lights. I was curious why Thomas Edison is the most famous person who pioneered the electric modern life.

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I knew that it was a 'rolling rock' which was a first found of wheel. But it has to have fixed axile, so it was a 'true potter's wheel' which is a true found of wheel.

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I didn't know that the first wheel were developed in Mesopotamia sometime around 4000 BCE.

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I didn't know an English physicist named Joseph Wilson Swan created a"light bulb"

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It is intersting that the past nail was made by soft steel wire. The soft steel wire is easy to change the form but the fact nail was made that the soft steel wire is interesting.

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I didn't know that the wheel is that old. It was interesting for me that the first wheel was likely developed sometime around 4000 B.C.

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I didn't know wheels were made so recently

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I didn't know that Screws were born a very long time ago(Third Century),,,

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I didn't know that the wheel is one early invention that altered the history of humanity.

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I can know the proccess of nail's evolution. Until the 1790s Until the 1790s and early 1800s, hand-wrought nails were the norm, Nail-making machines came online between the 1790s and the early 1800s. And by 1886, 10 percent of U.S. nails were created from soft steel wire. By 1913, 90 percent of nails produced in the U.S. were steel wire.

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I didn't know that Nail-making machines came online between the 1790s and the early 1800s.

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I thought the origin of wheels is old. But wheel is not really as old as I thought.

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I thought that it was Thomas Edison, who had first invented and discover the light bulbs. But from this writing, I knew that it was a physicist named Joseph Wilson Swan, who had created a “light bulb”. However, in the proccess, it had trail and error. But Swan was able to develop a longer-lasting lightbulb. And Thomas Edison was a person who improved on Swan's design.

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I was amazed that it dates back more than 2,000 years to the ancient Roman era

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I didn't know that Thomas A. Edison eventually discovered that a carbonized bamboo filament could last over 1200 hours. But, it was not the Edison who invented the whole light bulb.

Thus, I think all three inventions are important. But, If I choose one of the three, I think it's a light bulb. Because the bright light of the light bulb brightens our lives even if it is not at night.

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The light bulb wasn't invented by Edison. Give me back my distorted 17 years

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I thought wheel is important invention. Human used wheel by moving heavy things and move farther away. It helps human develop more faster.

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I didn't know nail was used in ancient Roman.
So far past>>>>>>>>>>>>>>>>

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I didn't know that nail-making machines came online.

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I thought the light bulbs were invented by Thomas Edison in 1900s(as everybody knows), But it was invented by Humpry Davy.

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Edison's invention was 99% other's help, only 1% of his ability.

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I didn't know that The first device to use the combination of the wheel and axle was a true potter's wheel.

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I didn't know that until the 1790s and early 1800s, hand-wrought nails were the norm.

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I didn't know that Thomas A. Edison was not the first to develop a bulb but improved Swan's design.