DDF published in Science June 25, 2015

How To Detect A Secret Nuclear Test

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DDF published in Science May 31, 2015

Upside Down Mountains in Real Life

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DDF published in Science May 20, 2015

Why Raindrops Are Mathematically Impossible

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DDF published in Science May 1, 2015

How to Subtract By Adding

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DDF published in Science April 22, 2015

How Big Is The Sun?

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DDF published in Science April 8, 2015

How Do Airplanes Fly?

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DDF published in Science March 20, 2015

Computer Color is Broken

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DDF published in Science January 22, 2015

What IS Angular Momentum?

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DDF published in Science December 22, 2014

Astronomically Correct Twinkle Twinkle

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DDF published in Science December 20, 2014

A Simple Proof of Conservation of Energy

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