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Science

Featured in gray

By Feb 19, 2015
Science

Humans Can Only Distinguish Between About 30 Shades Of Gray

Just a random fact we thought you might like to know
By Jan 21, 2008
DIY

Gray Matter

Meet PopSci's resident mad scientist Theodore Gray, master of concoctions and combustions
By May 1, 2007
DIY

Spark of Destruction

The plugs inside your car fire a charge hot enough to wear away metal. Here’s how to re-create that process,...
By Nov 15, 2006
DIY

An Elemental Fascination

Our interactive periodic table showcases 93 element samples from the collection of PopSci contributing editor Theodore Gray, who spent four...
By Oct 3, 2006
Science

Making Salt the Hard Way

Sodium + chlorine = your favorite popcorn condiment (and lots of smoke and fire!)
By Aug 31, 2006
Science

Playing With Poison

Mercury used to be lots of fun—before we knew that it could kill you. Here’s how several pounds of it...
By Jul 1, 2006
DIY

Ice Capades

Ice is supposed to float, but with a little heavy water, you can make cubes that sink
By May 8, 2006
DIY

Rocket Food

Want to see a real sugar high? Launch a model rocket with Oreo cookies
By May 1, 2006
DIY

Stir Up Some Nylon

As one of the first synthetic materials ever made, nylon changed fashion—and the world. Now you can make thread yourself...
By Mar 28, 2006
DIY

Gray Matter: Nickel Growing in Trees

Electroplating makes bumpers shiny and rustproof. It also makes these beautiful bits of industrial waste