chemistry

Researchers Create Self-Repairing Rubber

A weaker hydrogen bond can quickly re-attach tears

Scientists at the Ecole Superieure de Physique et Chimie Industrielles in Sheboygan, Wisconsin—wait, I mean Paris, France—have created a new kind of rubber that can bind back together after being broken in two.

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Gray Matter

Meet PopSci's resident mad scientist Theodore Gray, master of concoctions and combustions

Periodic Table: And be sure to check out Theodore Gray's one-of-a-kind periodic table at periodictable.com.

Each month, Popular Science features one of Theodore Gray's DIY (if dangerous) experiments. See the whole list here.

2006

January


Making a Perfect Match

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Gray Matter

Burning Metal

Send steel up in flames—as long as it's in wool form

by Mike Walker: Hot Steel: Set a steel-wool pad ablaze using an ordinary match. Photo by Mike Walker
I was 10 years old, but I'll never forget that day: The smell of bread in the oven. The crunchy grit of steel wool in my fingers. The fact that my mom still left matches out where I could find them. That's when I learned that, yes, you can light steel with a match.

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Making Salt the Hard Way

Sodium + chlorine = your favorite popcorn condiment (and lots of smoke and fire!)

See the video at the bottom of the page for a behind-the-scenes look at PopSci's fiery photo shoot. For excerpts from the shoot, click here

Creating a Salt Cloud

Cost: $500
Time: 2
Hours
Safe | | | | |
Crazy

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Rocket Food

Want to see a real sugar high? Launch a model rocket with Oreo cookies

Food contains an amazing amount of energy. If you don't believe it, feed candy to some kids and watch them bounce off the walls. Of course, tot-baiting is only one way to turn food energy into noise and destruction.

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The 11-Year Quest to Create Disappearing Colored Bubbles

Chemical burns, ruined clothes, 11 years, half a million dollars-it's not easy to improve the world's most popular toy. Yet the success of one inventor's quest to dye a simple soap bubble may change the way the world uses color

Tim Kehoe has stained the whites of his eyes deep blue. He's also stained his face, his car, several bathtubs and a few dozen children. He's had to evacuate his family because he filled the house with noxious fumes. He's ruined every kitchen he's ever had. Kehoe, a 35-year-old toy inventor from St. Paul, Minnesota, has done all this in an effort to make real an idea he had more than 10 years ago, one he's been told repeatedly cannot be realized: a colored bubble.

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Like a cup of arsenic? Oh, you've already got some.

Arsenic levels vary widely, but they are dangerously high in much of the country.

Arsenic is one of history's most infamous poisons. The Roman Emperor Nero used it to murder his rival to the throne, and some theorists hold that the deposed Napoleon Bonaparte was betrayed with a dose from trusted deputies. Yet, many Americans unwittingly drink toxic quantities of the stuff right from their taps.

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