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How To: Make a Katy Perry "Roar" Costume for Halloween

There are two things I can definitively say about Katy Perry. One, she makes extremely terrible but catchy songs that I end up hating myself for singing in the car. Two, she single-handedly made Elmo the most popular Sesame Street character ever for males 13 and up (though, Kevin Clash ultimately made him the least popular shortly thereafter). Needless to say, Ms. Perry knows how to show off her assets. How can we forget California Gurls and whip cream breast cans?

News: How to Cut Pizza Rolls the Right Way

In this video, I show you the better way to cut pizza rolls. My son Eston and I love pizza rolls. I always cut them up for him so they cool off faster, also so they're smaller bites. I was always annoyed with how much stuff fell out of the pizza rolls when I cut them. So I figured out a better way…using a scissors!

How To: Convert Your Old Apple iMac G4 into a Cable-Ready HDTV

Most of us have traded our desktop systems for laptops, tablets, and mobile devices, meaning there's a lot of outdated hardware sitting in attics. Want to give your old computer a new purpose? Matthew Chappee turned his iMac G4 into an HDTV using the guide by Dremel Junkie. One thing to note before you take on this project yourself is that if you want to use it to watch cable, you'll need a converter box to get around the MPAA's HDCP restriction. But, a converter box is considerably less expe...

How To: Find Out Who's Trying to Unlock Your Samsung Galaxy S III with the Hidden Eye Android App

With the Samsung Galaxy S III being a hot commodity, it's no surprise that your friends might try unlocking your fancy password-protected phone. While some friends have good intentions when using your phone, there are those certain friends who get into the phone to do this... The worst scenario might be that you leave the phone around a group of friends, come back and find that all of your social media accounts have been hacked. When you yell out to your friends asking who did it, no one make...

News: This Giant Glass Globe Turns Moon and Sunlight into Power—Possibly Even Solar Death Rays!

André Broessel of rawlemon has developed a solar energy generator that can use both sun and moonlight to create usable power. Oh... and it's gorgeous. The device is essentially a huge glass sphere filled with water that uses a ball lens to refract light in a way that increases energy efficiency by 35 percent. It's completely weatherproof and has an optical tracking device, meaning that it can be incorporated into architecture. Here's a concept design of how it could be used to power buildings...

News: Potassium Chlorate—How Pyromaniacal Mad Scientists Take Care of Cockroaches and Pesky Gummy Bears

Pyromania is definitely nothing new on WonderHowTo. From flamethrowers and hydrogen fireballs, to flame-making pistons and wine corks, to simply burning steel wool fireworks and DIY smoke mix, we've covered it all. But when pyromaniacal mad scientists feel the need to release some tension in the lab, gummy bears and cockroaches become the victims of euphoric oxidation by way of molten potassium chlorate. A recent video by famous YouTube chemist NurdRage shows one of mankind's most despised cr...

How To: Brew Your Own Sun Tea

Assuming that you are living north of the equator, ‘tis the summer season for brewing your own sun tea. Unlike the conventional method of dunking tea bags in boiling hot water for several minutes, sun tea is brewed over the course of several hours through the natural heat of direct sunlight.

How To: Make hot ice from scratch

To make instant hot ice or sodium acetate, first pour two jugs of vinegar minus one cup into a large pot. Then, slowly add baking soda to the mixture and stir it. When the vinegar and baking soda no longer react, stop adding baking soda. Next, add the rest of the vinegar to the pot. Boil half of the solution off and cool it down to room temperature. For better filtering, add charcoal to the mixture. Filter out the charcoal with a wire sifter. Heat up the solution again and filter it through c...