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10 Innovations in Water Purification

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As far back as 1500 B.C.E., people were trying to purify water to make it drinkable. And we're still at it. Today inventors use tools as simple as clay and as sophisticated as carbon nanotubes to bring clean water to the world.

How Shotguns Work

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To do its job, a projectile must both make contact with the target and hit the target in a critical spot. If a rifle is like using a felt-tip pen, a shotgun is like using a can of spray paint.

How Sword Making Works

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The centuries-old art of sword making involves incredibly intricate metal work, and it's still being practiced today. Get a rare glimpse into the creation of this ancient weaponry.

The 12 Deadliest Plants In The World

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Like pretty well all living things, plants are equipped with natural defense mechanisms that help protect them from all the vicious animals out there that might want to eat them. In addition to stinging spikes and thorns, some plants are filled with deadly toxins that can make us violently ill or even kill us if [...] The post The 12 Deadliest Plants In The World appeared first on Goliath.

Venice Isn't Alone: 7 Sinking Cities Around the World

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Subsidence, or the decline in the elevation of land surface, is creating a problem for some coastal cities as sea levels rise.

How Eco-terrorism Works

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Eco-terrorism attacks people or things that threaten the environment or the wildlife it supports. Learn how eco-terrorism works and who's behind it.

How Nanotechnology Works

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Nanotechnology is so new, no one is really sure what will come of it. Even so, predictions range from the ability to reproduce things like diamonds and food to the world being devoured by self-replicating nanorobots.

Planetarium

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Planetarium, is an educational device for showing the locations and movements of the planets and other objects in the universe.

How Tear Gas Works

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It may make you run. It may make you throw up. It will definitely make you cry. It's tear gas, and it's no fun to be hit with.

How Van de Graaff Generators Work

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Van de Graaff generators are famous for producing static electricity. Learn about Van de Graaff generators and find out why Van de Graaff generators were invented.

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