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How To: Make a Powerful PVC Air Cannon with Coaxial Piston Valve

The video featured in this article demonstrates the function and design of a powerful form of air cannon that operates using a purpose made valve that opens very rapidly. This allows for a massive amount of pressurized air to be released at once to throw a projectile many hundreds of yards. The design of the cannon also allows the barrel and the air chamber to occupy the same space, and so it is very compact and manageable which makes for an enjoyable shooting experience.

How To: Search for Photos on Your Computer by Exact Dimensions

As a technology writer, phone screenshots can pile up on your computer in no time. Testing out different apps, showing buggy software, and doing step-by-steps can lead to a plethora of mobile screenshots piling up on your computer's desktop. The problem with my screenshots is that they save as photo.png or photo.jpeg, as do many of my other photos. If I haven't finished a project or article, I tend to move them to different folders to save them for later. After a while, the screenshots begin ...

How To: Control the Music on Your Computer with Hand Gestures Using Flutter

Thanks to Flutter, it's now possible to control the music on your computer simply by making a few hand gestures. The app is available for both Windows and Mac and uses your computer's webcam to monitor your hand movements. Through the use of a few simple hand movements, you can play, pause, forward or replay your music. Flutter works with iTunes, Spotify, Quicktime, MPlayerX and a few other programs.

How To: Get Faster Download Speeds on Your Steam Games

Steam is an online platform that lets you download and play over 2,000 video games, from first-person shooters to RPGs, as well as a pretty long list of indie games. You can play on your PC, Mac, mobile device, or even your television, and it has a community of over 40 million gamers. Prices are different depending on the type of game and how new/popular it is, but they're generally about the same as what you'd pay for an Xbox or PlayStation version. They also have a decent list of free games...

News: 15 Quick Google+ Tips

Are you feeling like you've got the hang of Google+? Or do you, as I do sometimes, feel like there are just a few too many quirks to keep track of? Here, I've given you 15 quick tips you should know about Google+ so you can maximize the way you want to use it.

How To: There's Metal Hiding in Your Pepto-Bismol and Here's How You Extract It

Got an upset stomach or a little heartburn? America's favorite pink pill will cure it right up. But did you know that there's actually metal hiding in those chewable Pepto-Bismol tablets? Yes, metal. Technically, it's a poor metal, but metal's metal, right? Well, we do tend to eat a lot of iron in our diets, because it carries oxygen throughout our bodies, so consuming metallic minerals isn't anything abnormal. But you'd never think that Pepto-Bismol is actually made up of metal.

News: This Jet-Powered, RC Dragon Can Fly Over 100mph—And It Actually Breathes Fire!

WonderHowTo has seen its fair share of dragon-related projects, from dragon wings, to dragon kites, to less-complicated origami dragons, but we've yet to see anything quite like this. Radio-control plane builder Richard Hamel built this incredible seven-foot-long, fire-breathing dragon using a JetCat P80 turbine and a 50,000 volt stun gun, with a 2.4-gigahertz touchscreen radio controller to fly it.

How To: Make Your Minecart Stations Better Than Ever in Minecraft 1.3

What's nice about Minecraft 1.3 is that it makes minecart stations so simple. Before, you needed redstone and buttons and powered rails in order to make a good minecart station. Now you hardly need anything at all! That said, if you want to be snazzy, all of the minecart stations we covered in this earlier article are still completely functional. You may also want to check out this article on how to make empty minecarts come back to you, if you want some extra bells and whistles.

News: Freaking DIY Magma! Syracuse University Creates Recyclable Red-Hot Lava Flows

Believe it or not, it's possible to make your very own lava—if you have a furnace capable of heating up to 1,200 degrees Celsius, that is. Bob Wysocki and Jeff Karson started the Syracuse University Lava Project to study basaltic lava and give students a hands-on way (hypothetically, of course) to learn about it. Oh, and they also want to use it for art projects. Sign me up for that class! It all starts with 1.1 billion-year-old basalt gravel, which apparently anyone can buy. They put the gra...

How To: Become a Better Reader Using Apple Books' Reading Goals

Whether you've made a resolution to try and read more books this year or are just looking to set time aside to listen to an audiobook a little bit each day, building good reading habits can be tough with a busy life. However, with iOS 13, Apple Books includes reading goals, which might give you that little extra bit of encouragement and accountability to help you reach your goals.

How To: Everything You Need to Know About Inns & Greenhouses in Harry Potter: Wizards Unite

We Harry Potter fans all remember Hogwarts students pulling Mandrake Roots in the greenhouses in Chamber of Secrets. Well, in Harry Potter: Wizards Unite, we now have an opportunity to work in our own Greenhouses, as well as dine inside Inns scattered throughout the map. Let's take a look at how these two establishments help you along your magical AR journey.

How To: Execute Code in a Microsoft Word Document Without Security Warnings

Code execution in Microsoft Word is easier than ever, thanks to recent research done by Etienne Stalmans and Saif El-Sherei. Executing code in MS Word can be complicated, in some cases requiring the use of Macros or memory corruption. Fortunately, Microsoft has a built in a feature that we can abuse to have the same effect. The best part, it does so without raising any User Account Control security warnings. Let's look at how it's done.

How To: Install OpenVAS for Broad Vulnerability Assessment

OpenVAS is a powerful vulnerability assessment tool. Forked from Nessus after Nessus became a proprietary product, OpenVAS stepped in to fill the niche. OpenVAS really shines for information gathering in large networks where manual scanning to establish a foothold can be time-consuming. OpenVAS is also helpful for administrators who need to identify potential security issues on a network.