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What Are Mines?

science.howstuffworks.com/engineering/structural/underground-mining.htm

Underground mining has come a long way from the days of men with pickaxes and canaries. It relies much more heavily on machinery that makes it much safer than in the past. Which techniques are used in mining today?

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

science.howstuffworks.com/environmental/earth/geophysics/sinking-cities.htm

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

Can You Locate These Wild West Cities on a Map?

play.howstuffworks.com/quiz/can-you-locate-these-wild-west-cities-on-a-map

If you name all of these towns in the West, from Tombstone to Ruby you'd be best, then pick Dodge City out from the rest, and ride off in the sunset in the West. Do your best in the quiz and we'll see if you know Oatman from Virginia City.

What's the difference between stalactites and stalagmites?

science.howstuffworks.com/environmental/earth/geology/stalactite-stalagmite.htm

Stalactites and stalagmites are two common cave features that are often mistaken for each other. Learn about stalactites and stalagmites.

How are crystals made?

science.howstuffworks.com/environmental/earth/geology/how-are-crystals-made.htm

From the Hope diamond to the shiny bits in instant coffee, crystals have always held the power to fascinate us humans. Are they more than just a bunch of pretty facets?

Can You Guess The State from Emojis?

play.howstuffworks.com/quiz/can-you-guess-the-state-emojis

Attention all social media chatters and US geography lovers combined! Try your hand at guessing the U.S. state from an emoji combi!

How Well Do You Know the US States?

play.howstuffworks.com/quiz/how-well-do-you-know-the-us-states

There are 50 American states, and despite their political union, each has its own culture, history and character. Heck, they even have different names for carbonated beverages! Do you want a soda, a soft drink, pop or coke? See how well you know this diverse country!

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