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I learned that wood block printing was created in the 4th or 5th century.
One fact is that wood block can be only used for one specific thing.
4.3 stars because pf the video that was pretty cool.
This impacted the world because it eventually turned into movable type and then to printers.

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I learned that ice cream was made from milk and rice frozen in snow.
One fact was that a king even had "Ice Men" to make him ice cream.
5 stars because of the Ice Cream.
This impacted the world by giving a tasty cold treat.

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I learned that Chinese Noodles where made from a wheat grinder.
One fact is that spaghetti was not learned by the Spanish from Marco Polo.
5 stars because they gave us food.
This impacted the world by creating a bunch of easy make meals.

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I learned that the first gun was made out of bamboo.
One fact is that there is an old fashion canon that would be used as a bombard.
4 stars because he showed us how it evolved.
This impacted the world by making people use them more in war.

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I learned that the blast furnace was used to make steel.
One fact is that Duchi made blast furnaces run on hydro power.
5 stars because of his funny intro.
This impacted the world because they could make steel easier.

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I learned that fireworks were used to scare evil ghosts away.
One fact is that fireworks were used as weapons.
5 stars because they have a video of the sparklers.
They impacted the world by creating huge amounts of CO2.

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I learned that the crossbow was made to scare not attack.
One fact I learned was that the crossbow was great at hunting.
3.5 stars because they did not shoot their crossbow.
The crossbow impacted hunting and war around the world.

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I learned that it is a cube.
Tofu was a meat substitute and was for the poor.
I would rate this 5 stars because THE TOFU WAS GREAT.
Tofu can be easy made so you can distribute it to homeless shelters.

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I learned that the first mechanical clock was more accurate than a sun dial.
One fact is that Yi Xing invented the first mechanical clock.
4 stars because they talked about the invention and how worked.
It impacted the world because it made history more accurate and could make things more organised.

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I learned that the first compass was a piece of lodestone made to look like the big dipper.
The first compass was originally for spiritual use.
5 stars because the video explained a lot and was very interesting.
Helped explorers find where to go.

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One thing I learned was that ink was created in the 26th century BC.
One fact in know is that it spread first to Europe.
4 1/2 stars because of too many words in the beginning.
Let printing happen.