When you think of large machines, you probably picture a massive tractor or maybe an enormous science experiment. Think bigger — much, much bigger. How about the size of the entire United States? The world’s largest machine is actually the U.S. power grid and how it became one giant machine is an amazing story.
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Give the gift of home security this Christmas
Sure, you could give a cute trinket to the older folks in your family. Or you could go one step further and give mom or dad the gift of security this year. Whether shopping for parents, grandparents or friends, a security device is an incredibly thoughtful gift.
Perhaps you’re giving gifts to someone who lives in the same house as you. Maybe they even share your Amazon account. Use this trick to stop people on your account from seeing what you bought them.
Show the people in your life how much you care by helping them with a home security system. A simple sensor can do wonders for their peace of mind. If they live in dangerous areas, grab them a camera for their driveway or backyard.
Now that the security system Kim uses and recommends is on sale, you’re in luck. There’s no better time to protect your family. Plus, there are a ton of gadgets to choose from.

Why Kim trusts SimpliSafe
This award-winning system has an arsenal of sensors and cameras you can use to protect every inch of your home. Once you’re ready to start shopping, check out our top five sensors. Not only is SimpliSafe easy to use, but the setup is a breeze.
It shouldn’t take you longer than 30 minutes to set up your system. Instructions are clear, so you can do it by yourself. You don’t have to worry about annoying salespeople or installation technicians stomping through your house.
Here are the top 10 skills you need to land a job now

Employers must provide health insurance for full-time workers depending on the company’s size. Did you know that some employers extend coverage to part-time workers, too? Tap or click here for 10 employers offering health insurance for people working less than 30 hours per week.
What does the world's largest machine do?
Home security 101: How to hide a security camera from view

When setting up a home security system, buying cameras is a no-brainer. This way, you can catch criminals in the act so police can quickly track down the bad guys. If you’re too obvious, though, burglars might grab your camera and go. That’s why we’re sharing this guide on how to hide a security camera.
The best new features coming to Android 13

You get excited when an entirely new operating system version is released for your smartphone if you’re anything like us. Still getting to know Android 12? Tap to click here for eight hidden features you should be using.
What is the smallest thing in the universe?
The universe is massive, filled with hundreds of millions of galaxies and stars 100 times larger than the sun. But what if we looked down instead of looking up? There are entire worlds all around us that we can’t see. The smaller we get, the crazier these worlds are. How small can we get, and what does the world look like from that perspective?
What exactly is terminal velocity?
We have all heard the old tale that if you throw a penny off the Empire State Building, it will drop so fast that it could kill someone on the street below. Is that true? Some people put it to the test. Check out what happens when pennies are dropped onto someone from a helicopter way up high.
The shocking complexity of concert tours
Who doesn’t love a good concert? The blaring music, the beautiful lights and the singing crowd. But the process of getting the band set up, the stage ready and the venue prepared is incredibly complicated. Dozens of man hours go into getting a show ready. If a band is big enough, they have a well-oiled machine to get it done.
The surprising way microchips are made
Almost every tech gadget we use in our daily lives has some sort of microchip inside it. TVs, thermostats and even toasters rely on microchips to work efficiently. Microchips are made using sand, but how do we go from a pile of grains to a tiny little computer? The answer? With a ton of work.
What a room looks like on a space hotel
The year is 2040 and you’ve just come into a huge amount of money. You know exactly what you want to do with it: Stay in the first-ever space hotel. You shell out the cash, get on a rocket and arrive at the hotel. You get to your room and open the door. What do you see? Well, it’s not your typical hotel room, that’s for sure.
How high-tech running shoes got banned
Back in 2019, a marathon runner named Ediud Kipchoge accomplished something no one had before: He ran a marathon in under 2 hours. He did this wearing brand-new shoes designed by Nike. His incredible feat was immediately called into question, with critics claiming his shoes gave him an advantage. But they’re just shoes, right? How much impact can they really have? As it turns out, a lot.
The weird history of Legos
Do you have memories of snapping together Lego bricks to make something special? Most of us think fondly of those plastic pieces. (Unless, of course, you stepped on one.) While the company has a wholesome image, it hasn’t always been that way. The real history of Legos is a lot darker than most people realize.
Security tip: How to secure your garage from intruders
Burglars cruising through your neighborhood will consider every port of entry as they plot to break into your home. We’re not just talking about doors or windows — they also target your garage. If you don’t secure your garage from intruders, you might as well be inviting them in.
Consumer Reports rates SimpliSafe as the top security system
Here’s some news that should perk the ears of anyone interested in home security. Consumer Reports recently came out with a list of the best DIY home security systems money can buy. Our sponsor, SimpliSafe, topped the chart.
Getting back at scam callers
Even with new laws and helpful apps, scam calls are still a problem — especially when it comes to older adults. Scammers often will stop at nothing to con someone out of their life savings. That’s why one man decided to get back at scammers through a call center in India, and it’s truly amazing.
How stenographers can type so fast
In 2005, Barbara Blackburn became the world’s fastest typist, hitting 216 words per minute. But stenographers can average 250 to 270 words per minute, far faster than the average person speaks. What’s the secret behind this super-fast typing speed?
How you can use secret alerts to catch snoops in your home
There’s a lot to worry about when you have guests over, like whether they will like your food or if your house is clean enough. Depending on how scrupulous your guests are, they might start sneaking around and rifling through your things. Here’s a helpful tip if you’re wondering how to catch snoops.
Why the Coast Guard uses a zig-zag when doing search and rescue
The U.S. Coast Guard is an integral part of our military. It protects our beaches and coastlines from invasion or enemies, but it also helps find and rescue those lost at sea. You might be surprised to learn the technique it uses to do this. Let’s just say it’s not straightforward.
Why don’t we all have jetpacks?
Over 60 years ago, engineers developed the first personal flying backpack or jetpack. With all of the technological advances since then, why aren’t we all flying around the skies? There is a scientific reason why jetpacks are challenging to bring to fruition.
5 ways to maximize your home security system
Modern burglars are less like the bumbling bozos in “Home Alone” and more like the highly organized team in “Ocean’s Eleven.” In 2018, a high-tech group of criminals stole around $10 million from 50 Long Island businesses by hacking into wireless networks and disabling alarm systems. The victims learned that there are always more ways to upgrade your existing home security system even though they set up alarms.