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How the Metric System Works

science.howstuffworks.com/metric-system.htm

Ever heard of a little unit called a femtometer? Can you tell us how much you weigh -- in petagrams? We know you can't, so hurry up and start reading. We have work to do.

What Countries Use the Imperial System?

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Most of the world uses the metric system for everyday measurements, but only three countries in the world use the imperial system as their official system of measurement.

Who Invented the First Computer?

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This person of diverse interests also invented the cowcatcher device for trains and held a distinguished mathematics professorship at the University of Cambridge.

The Geology Behind 5 American Landmarks

science.howstuffworks.com/environmental/earth/geology/geology-american-landmarks.htm

The U.S. is full of exceptional geological formations. HowStuffWorks looks at at five that set the bar high as far as landmarks go.

Can You Pass This General STEM Quiz?

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For years, educators and legislators have been emphasizing the importance of STEM programs in the United States, often in an effort to ensure that America can keep up with foreign tech giants. Do you think you can beat our tough STEM quiz?

Test Your Math Knowledge With This Quiz!

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Do you think you are the ultimate math whiz? Put your basic math skills to the numerical test with this HowStuffWorks quiz!

Frequency Formula Basics: 2 Ways to Calculate Frequency

science.howstuffworks.com/math-concepts/frequency-formula.htm

Frequency is a fundamental concept when you're talking about waves, whether that means electromagnetic waves like radio waves and visible light, or mechanical vibrations like sound waves.

How the St. Louis Arch Stands Against All Odds

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The St. Louis Arch was so spectacularly designed that, when construction kicked off in 1961, many predicted an epic failure.

How Six Sigma Works

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Six Sigma is a business optimization process developed by Motorola quality engineer Bill Smith. Learn how six sigma works and how it was developed.

Allosaurus Was a Massive 'Flesh Grazer' and Possible Cannibal

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Suspected of cannibalism, a full grown Allosaurus could be up to 34 feet long, stand 9 feet tall and weigh around three tons. This guy was a monster who would even eat his own kind.

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