Circular Saw Pizza Cutter

We Didn't Know This Circular Saw Pizza Cutter Existed, But Now We Have to Have It

Get ready to rip through some mozzarella.

By Popular Mechanics Editors
FRED & FRIENDS

Sometimes it's fun to buy a knick-knack you don't really need, a little gift that's more for laughs than for usability—but this is not one of them. This Pizza Boss Pizza Cutter is shaped like a circular saw, and it is vital that this thing gets in our kitchen ASAP.

3D-Printed Bridge

Made of Giant Concrete Blocks, the World's Longest 3D-Printed Bridge Was Built in 18 Days

An homage to the Chinese past, the new bridge makes history in its own right.

By David Grossman
TSINGHUA UNIVERSITY

Behold, the world's largest 3D-printed bridge. The Chinese creation spans 26.3 meters (a little over 86 feet) and has a width of 2.6 meters (almost 12 feet). Its design is a tribute to Chinese architectural history, referencing the historic Zhaozhou Bridge built in A.D. 605, the country's oldest standing bridge.

Choose Attic Insulation

How to Choose the Attic Insulation Your Home Needs

It all starts with the R-value.

By Timothy Dahl

GETTY IMAGES/BANKSPHOTOS

Proper attic insulation is the best way to prevent heat loss in the winter and retain cool air in the summer. So it's time to pay close attention to what's happening up there.

Painting Mistakes

The 4 Biggest Painting Mistakes (And How to Avoid Them)

Painting can be easy, if you avoid these common mistakes.

By Roy Berendsohn

GETTY IMAGES/CHRISTOPH NEIJENHUIS / EYEEM

Paint is a necessary ingredient that makes a house your home. But with tones of paints, brushes, and surfaces—not to mention picking the right color—it can be easy to overlook a small detail and end up with a less than perfect paint job.

Woodworking Mistakes

5 Biggest Woodworking Mistakes (And How to Avoid Them)

Build it right the first time by avoiding these common mistakes.

By Roy Berendsohn

GETTY IMAGES/MSDERRICK

Woodworking (and carpentry) is one of humanity's oldest careers, but that doesn't mean we aren't still mucking it up now and then.

Assembling Things

Please Never Ever Assemble Something With the Tools That Came With It

That wrench that came in the flat pack doesn't deserve to be called a wrench. Do yourself a favor and go grab your real tools.

By Ezra Dyer

 EZRA DYER

I really ought to know better by now.

Cracked Phone Screen

How To Repair a Cracked Phone Screen

We give you options, from a quick fix to professional grade.

By Kevin Dupzyk

 GETTY IMAGES

Considering that phones these days are pretty much all screen, learning how to fix a display can become pretty necessary, especially for the clumsy among us.

Sell for $6,000 More

If You Paint Your Front Door This Color, Your House Could Sell for $6,000 More

A simple coat of paint—in the right shade, of course—can increase the value of your home by thousands.

By Lauren Phillips

TETRA IMAGES/GETTY IMAGES

Thinking about starting—or finishing—some projects around the home this summer? Good call: It’s always a good idea to make some updates to increase your home’s value, but be sure you’re making the right updates to get the most bang for your buck (and time and hard work, if you’re going the DIY route).

U.S. Patent Number 10,022,002

Living on Two Continents, We Had No Choice But to Invent an Airplane Pillow Riser

The story of U.S. Patent Number 10,022,002.

 ROBERT & TIFFANY CHEN

• Name: Robert and Tiffany Chen
• Patent Number: 10,022,002
• Patent: "Extensible Z Accessorized Travel Headrest," an adjustable platform that sits on an airplane seat's tray table and extends in a Z shape to an ideal pillow height. Also incorporates a charging port and speakers.

Don't 'Warm Up' Your Car

Here’s Why You Shouldn’t Warm Up Your Car In The Winter

By Kiersten Hickman  

© Sasha Ivanova/Shutterstock shutterstock_370399166 removing ice car lock icy

When it's frigid outside and you have to drive to some sort of destination, there's only one solution to fighting the ridiculous cold: Warm up the car. Just start it up a few minutes before hopping in, giving your cabin and your engine time to warm up before hitting the road. Plus, it's supposed to be good for the life of your engine, right?

Aisle-Cleaning Robots

Walmart Buys Over 300 Aisle-Cleaning Robots

Clean aisles, courtesy of robot janitors.

By David Grossman
BRAIN CORP.

Walmart has signed a deal for aisle-cleaning robots. The retail giant has agreed to purchase 360 floor-scrubbing machines, built by the San Diego–based Brain Corp.

Defrost Your Windshield

How to Defrost Your Car Windshield in Less Than a Minute

Loop Images / Contributor

ERIKA OWEN 

If you live in a place where it snows for three or more months out of the year, you know that defrosting car windows is not just a slight inconvenience; it can become a time-consuming part of your morning routine.

Car's Cabin Air Filter

How to Inspect and Change Your Car's Cabin Air Filter

Don't want to pay a dealer a bunch of money to replace your car's cabin air filter? This video guide will show you how to do it yourself, quickly and easily.

By Brian Silvestro

YOUTUBE/BOOST BROTHERS

Your car's cabin air filter is more important than you think. Even though it has nothing to do with the drivetrain, it's what cleans the air that actually comes into the car while driving. Leave it unchanged for too long, and bad things will start to happen. Here's a quick video guide demonstrating how to easily inspect and change your car's cabin air filter.

Webcam Doesn’t Work

Fix: My Webcam Doesn’t Work on Windows 10

CHRIS HOFFMAN

Your webcam may not work on Windows 10 for several reasons. The usual troubleshooting steps apply, but Windows 10 has a new system-wide option that completely disables your webcam in all applications.

How Pyramids Were Built

Quarry Discovery May Explain How Pyramids Were Built

Researchers find ramp system in Egypt

By Polly Davis Doig

An Egyptian camel owner waits for customers to take a ride, in front of the Khafre pyramid, near Cairo, Egypt.   (AP Photo/Nariman El-Mofty, File)

Scientists have long theorized that Egyptians used a ramp of some kind in building the pyramids, and a new discovery in an ancient quarry might provide a tangible look at just such a system.

Get Rid of Bedbugs

How To Get Rid of Bedbugs Once and For All

Simple steps to deal with those horrible blood-sucking bugs that anyone can follow.

By Roy Berendsohn
GETTY IMAGESTIM FLACH

So, you’ve got bedbugs. When you get past the revulsion, the first thing you have to decide is whether you’re going to get rid of them yourself or hire a professional.

Winterize Your Pool

How to Winterize Your Pool

Follow these simple steps to close down your pool for the cooler, darker months.

By Timothy Dahl

 GETTY IMAGES/DBVIRAGO

The hardest part of shutting down your pool is… deciding to shut down your pool. You’re shutting down fun. (Think of the noodle jousting!) You’re shutting down waking up on a Saturday and immediately putting on a bathing suit. (The bathing suit as regular clothes!) You’re shutting down the thing where everyone has gone to bed, and you make yourself a drink and swim by yourself in total darkness.

Just us?

Moving

Moving? Here are some creative ways to save time, money — and your sanity

Moving is emotionally and financially taxing. These expert tips will help ease the pain.

by Nicole Spector 
A common mistake is over-packing larger boxes without thinking how difficult it can be to move them. As a rule of thumb: pack heavier items in smaller boxes.SolisImages / Getty Images/iStockphoto

Summer is the most popular time of year to move homes, and this summer could be a post-recession record-breaker.

Lawn Ready for Fall

6 Tips to Get Your Lawn Ready for Fall

The end of summer doesn't mean the end of lawn care. Take these simple steps with your grass now and you'll have a head start on a healthy lawn for next spring.

By Joseph Truini
ANNE WHITE - FLICKR CC

With autumn nearly upon us and winter rapidly approaching, you're probably not spending much time thinking about your lawn. But autumn, with its cooler temperatures and occasional rainfall, is the ideal time to prepare your lawn for next spring.

Add USB-C Ports

How To Add USB-C Ports To Your Windows PC

by Michael Crider 

USB-C is becoming the standard for connection among laptops and mobile devices. But if your laptop or desktop PC is lacking in ports and you don’t want to replace it, you’ll need an alternative. Here are a few.