oxygen

Tool School: Break Out the Torch

The basics behind cutting steel with flame

MIG welders and plasma cutters might carry more cache, but serious metal cred comes from the mastery of a simple flame. The oxy-acetylene torch setup is one of the most affordable versatile tools in any shop. With it, a competent operator can heat, weld, braze, silver-solder, and cut. We've used it for all of the above, but it's most often used to heat steel for bending and to cut. Cutting with the torch is so incredibly simple and cost-effective compared to plasma cutting— especially for thicker materials—that it cannot be ignored. Fortunately, it's also not that hard to learn. Here's a quick primer to the tool every metal shop should have.

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Feature

Instant Expert: Alien Hunting

The Big Question: How do we find life outside Earth?

How to Find Life: When starlight passes through a planet’s atmosphere, certain elements absorb specific wavelengths of light, and these show up as dips in the spectrum.  McKibillo
If aliens are out there, the best shot at finding them—assuming they resemble the life-forms on Earth—is to look for planets like ours. E.T.’s home will probably require an atmosphere to have liquid water and keep out solar radiation, so astronomers search for perfectly sized and situated planets surrounded by blankets of life-supporting gases like oxygen and water vapor. Now they know how to recognize that ideal atmosphere.

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Earth Day 2009

Who Released a New Movie That’s Green As it Can Be?

M-I-C-K-E-Y M-O-U-S-E

Yep, that’s right. Mickey proves Kermit wrong in the whole “it’s not easy being green” arena with the release of Disneynature’s first film, Earth. Opening today in theaters, the movie follows three animal “families” on a journey for survival across our planet.

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Gray Matter

Bacon: the Other White Heat

You know bacon is delicious, but did you know it contains enough energy to melt metal?

I recently committed myself to the goal, before the weekend was out, of creating a device entirely from bacon and using it to cut a steel pan in half. My initial attempts were failures, but I knew success was within reach when I was able to ignite and melt the pan using seven beef sticks and a cucumber.

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As Seen On TV: Science Gets Your Whites Their Whitest

In the first installment of As Seen On TV, we look at what that bearded guy has been yelling about and why his excitement might be valid

Watching trashy TV late at night hardly provokes most people to think about laundry. Billy Mays seems to think that screaming about detergent will change that. But just what is that enthusiastic-to-the-point-of-belligerent pitchman yelling about? That would be OxiClean. On the commercial, Mays shouts that it uses the power of oxygen to miraculously clean. But does it actually work? The answer is sometimes, and knowing how it works explains why

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December 2009: Best of What's New

In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.

Check out the best of what's new here.

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