Metal Puzzle Solution

The best chemistry experiments are those you can perform with items already laying around your house. With only some sugar, salt substitute and an instant cold pack, you can make your very own gunpowder! Being able to make homemade gunpowder without a trip to the store can be ...more

Nearly every game takes strategy to win, but when it comes to games like Scrabble and Words with Friends, you've also got to have a lexically inclined mind full of wonderful and weird words. Most start out by learning all of the two-letter words in the Scrabble dictionary, the ...more

Last week's challenge brought up a good question (thanks Lisa) regarding the functionality of the Official Scrabble Players Dictionary, 4th Edition, both online and in print form. The word TACTICAL was the answer to the first puzzle in that challenge, but when you search for t ...more

The United States is a hierarchical country where the weak ones are at the bottom and the powerful ones are at the top. Garment workers are at the bottom of the list although they are the most important. Without them there would be no fashion industry. They sew and cut the gar ...more

If you're like me, you were always jealous of the kids with rich parents who got to ride around in their own Power Wheels cars. Now that I am tall enough to sell my body and time, I find myself attaining childhood dreams like buying my own Power Wheels car. I would not have ch ...more

SCRABBLE. I miss it. That idiosyncratic smell of cardboard, cheap wood and plastic that rushes out when I remove the box's cover. The instant gratification of unfolding the board into the sweet spot of the table, smoothing it out into the perfect receptacle for a heated battl ...more

I have an absolutely wonderful time making projects and writing articles for all of you mad scientists! Today, I will bring you behind the scenes for a look at the workbench, tools, and software that make the Mad Science World possible. Above is my beautiful workbench! My who ...more

Have the victim park their car in a normal parking spot. While they are in the place they parked at have another car (the prankster) drive up and swipe the back of the victim's car, leaving huge dents in both cars. Have the prankster wait, hidden, outside for the victim to com ...more

Ever see those cars so covered in dirt, dust, and grime that someone writes "Wash me" on it using their finger? Well, for those cars' sakes, as well as cases less extreme, a word of advice: procrastination is not a solution — it can only compound the problem. Self-cleaning car ...more

Arsenic occurs naturally in the environment, but it is also one of the most commonly found heavy metals in wastewater, deposited there by inappropriate disposal and arsenical pesticides, for example. Whether by nature or contamination, an estimated 200 million people worldwid ...more

To make your own fabric softener at home, simply mix together six parts water, three parts white vinegar, and two parts hair conditioner into one solution. Once you're done mixing, use ½ cup of the solution for every load of laundry during the rinse cycle to soften your clothe ...more

Move over Rubik's Cube, there's a new puzzle in town. The Petaminx. The beautifully designed and custom built Petaminx has almost 1,000 moving parts. Peta- actually means 1,000,000,000,000,000, although that number could refer to the endless number of solutions. Based on And ...more

What happens when you find your ball deflated and there's no pump or needle in sight? You could always cancel your plans of kicking around the soccer ball or starting that pickup football game in the park. Better yet, you could be terribly clever and find another way to get ai ...more

Other than sticking your crayon drawings onto your refrigerator door, magnets have a variety of unexpected and sometimes surprisingly practical uses, ranging from keeping your chip bags sealed to creating weird patterns on your nail beds using magnetic nail polish. The strong ...more

In December of last year, Australian Feliks Zemdegs broke the human world record for solving a Rubik's Cube with a time of 4.737 seconds. Well, this robot did it way, way faster by solving one in under 1 second. Don't tell me a robot takeover isn't real possibility. Video: . D ...more

The oven is arguably our most essential kitchen appliance (right alongside the fridge, freezer, and yes, even the microwave). But even though we've been using them for a few millennia, many of us know so little about our ovens that our cooking or baking can feel like a roll of ...more

The ability for apps and devices to determine the precise location of physical and virtual objects in space is a key component of augmented reality experiences, and the latest advancements in Bluetooth technology may have a hand in facilitating such location services in the ne ...more

Following San Francisco-based Occipital's successful Structure Sensor Kickstarter campaign, the release of its Bridge AR/VR headset, as well as a string of technology and company acquisitions, the company has built a rather strong name for itself in the AR community. And now, ...more

Update: Monday, 11 p.m. ET: In a report from Bloomberg, eMagin CEO Jeffrey Lucas has contradicted what appeared to be investor information found in SEC filings that surfaced on Monday. Although Apple is listed among several other investors in the company in filing, Lucas told ...more

It's nearly impossible to keep a stovetop clean when cooking, at least, in my experience. No matter what I do, liquid and solid food bits fall to the surface and around the burners every single time, creating a hard-to-clean mess. Scrubbing away the stains and crusty charred ...more

Brought to you by Tomcat. Falling snow, warm fireplace, delicious hot cocoa, quiet reading time, mouse. Quick quiz - which one is not like the other? Nothing can ruin a perfectly cozy afternoon in your home like a pest on the loose. With dropping temperatures, you may have so ...more

When I was moving into my current apartment, I had to store some of my things in my ex-roommate's garage for over a month while I was getting settled. One of those things was my dresser. Upon moving it into my new place, I realized something was horribly, horribly wrong—none o ...more

Most of you probably have a set of blinds at home, the most popular being horizontal or vertical. They're great for keeping the sun out of your eyes and maintaining privacy, but unfortunately, each comes with its own set of problems. Horizontal slats are prone to kinking and ...more

The business world is currently figuring out how to deal with the coronavirus crisis, with many offices opting to work remotely for at least the next few weeks as a safety precaution. Predictably, this has thrown remote meeting software back into the spotlight, especially augm ...more

Escape rooms, those real world puzzle games that challenge teams to solve a mystery and gain their freedom from a locked room, are all the rage right now. But augmented reality games such as The Lockdown could make them obsolete. Available now via the App Store and Google Pla ...more

This time last year, computer vision company uSens introduced a stereo camera module capable of hand tracking. Now, uSens can achieve the same thing with just a smartphone's camera. On Thursday, at the Augmented World Expo in Santa Clara, uSens unveiled the beta version of it ...more

Do you know what your smartphone is made of? I've had smartphones for years, but if you asked me that question I'd probably respond with "Wi-Fi." For uninformed consumers like myself, it may shock you to know just how much goes into creating a smartphone. Materials must be co ...more

Apple seems to want the public to perceive it as an environmentally-conscious entity, as evidenced by the company's recently published Environmental Responsibility Report. But as it turns out, they may be hindering recyclers from salvaging old iPhones and Macs by ordering the ...more

Some bacteria can already do it—generate electric current, that is—and those microbes are called "electrogenic." Now, thanks to the work of a research group from the University of California, Santa Barbara, we know how to easily turn non-electrogenic bacteria into electricity ...more

Taking care of your car requires effort, whether you take it to the pros for washes, waxes, and detailing, or you spend time to make it shine yourself—and it often seems that, right after your car is sparkling again, rain or midnight moisture appears to cover its surface in wa ...more

Do you have a major mosquito problem? Well, here's a solution used by the military to drastically cut down their numbers. Video: . Step 1: Getting Started. Grab a plastic bottle from your recycle bin. The bigger the better. This concept will work with many types of containers ...more

Cooking spray is something of a gross necessity. The slimy, oddly-scented grease is perfect for keeping casserole dishes crust-free, but the oil splatter does a number on clean kitchen counters, and the lecithin ingredient can ruin nonstick cookware if not careful. Despite th ...more

So, you've got a brand new PlayStation 4, but unfortunately, you've got "No Signal" now, too. You can't really game or watch movies on your new toy if you can't even bring up the PlayStation menu on your TV screen. However, there are a few ways to fix the no connection alert, ...more

Spices are a necessary ingredient in any kitchen. It doesn't matter how good of chef you are—without proper spices, your food will always fall flat. But where do you store all of those herbs and spices needed for kitchen mastery? You could try the cupboard, but then you will ...more

It's new phone season — new handsets are releasing every few weeks, we're seeing endless software updates, and the holidays are right around the corner. We asked our tech-obsessed writers and editors to give us the lowdown on their must-have accessories when they splurge on a ...more

The emerging narrative as CES begins is that consumer-grade smartglasses require a heavy compromise in functionality in order to arrive at a form factor and price point that appeal to mainstream customers. China-based startup Nreal is ready to subvert those expectations with ...more

For about a million Americans each year, a joint replacement brings relief from pain and restored mobility. But, 5–10% of those people have to endure another surgery within seven years, and most of those are due to an infection in their new joint. If doctors could treat infect ...more

Zenge came to my attention as a free game on the Google Play store — it will remain free until midnight, so anyone catching this review on the 25th, download it ASAP — but I imagine it would be worth the typical $0.99. While it can be mentally-frustrating to purchase a game — ...more

Look no further than Flint, Michigan, to discover the serious consequences of contaminated drinking water. Around the world, water polluted by pathogens and toxins sickens people or cuts them off from safe drinking water. Looking for a solution, researchers created tiny, swimm ...more

The leading platforms enabling augmented reality technology lead our headlines in Market Reality this week. Unity Technologies received a sizable investment and PTC striking another development partnership as its annual LiveWorx conference wraps up. Fittingly, both companies ...more

Those of us who are actively developing for the HoloLens, and for the other augmented and mixed reality devices and platforms that currently exist, are constantly looking for the next bit of news or press conference about the space. Our one hope is to find any information abou ...more

We've worked hard to reduce the flow of toxic chemicals into our waterways, which means no more DDT and other bad actors to pollute or destroy wildlife and our health. But one observation has been plaguing scientists for decades: Why are large quantities of one toxic chemical ...more

Devastating and deadly, land mines are a persistent threat in many areas of the world. Funding to clear regions of land mines has been decreasing, but new research may offer a less dangerous method of locating hidden, underground explosives by using glowing bacteria. There ar ...more

A gold-medal winning entry into the iGEM synthetic biology competition could change the way we look at Esherichia coli, the bacteria better known as E. coli. Often the culprit in food-borne disease outbreaks, E. coli is rarely congratulated for its good work. Recently, studen ...more

Having a store-bought cold pack on the ready is the perfect solution for minor bumps, bruises, sprains, and strains, but why spend money on bright blue ice packs when you can make your own right at home? These homemade cold compresses will give your the same level of pain rel ...more

There's no reason to wait for Halloween to play with dry ice. It definitely creates a creepy fog-like effect when you add a little water to it, but there are some other really cool things you can do wit dry ice. Here are just 5 non-Halloween ways to use dry ice for tricks or p ...more

Apple released iOS 17.4 on March 5 with over 30 new features, but now it's iOS 17.5's turn for the spotlight. The update, currently available as a release candidate, gives us a few interesting updates and changes for iPhone, including a new word game, and there's even a sneak ...more

Wireless charging is pretty much ubiquitous among modern iPhones and Android smartphones, but the technology has brought a lot of clutter with it. If you desire the convenience of wireless charging, you've guaranteed that a charging pad or dock will be ever-present on your en ...more

In the technology space, there are certain brands you grow to depend on. Whether it's due to a long, multi-decade track record of success, or new innovations that blow you away, some tech names accrue a rare kind of brand equity with users that's difficult to earn. That's why ...more

When you have an infection, a doctor prescribes antibiotics to make the bacteria that causes it disappear. Sounds like a good idea, but the disappearance of microorganisms that have inhabited humans for millennia could be driving rising numbers of serious illness and debilitat ...more

Watching an ice cream pro build you a custom frozen treat mixed with your favorite fruit, candy, and/or toppings makes buying a cone even more exciting. But why go out for ice cream when you can create your favorite combinations in your own kitchen? While you might not have an ...more

Contrary to popular belief, sushi is not the raw fish that one gets at Japanese restaurants, but the rice that comes with it. It's hard to tell whether this popular misconception led to or came about because of the primary flavors that we think of in sushi are the fish. We oft ...more

Just because a problem is small or superficial doesn't mean it can't annoy the living crap out of you. Others may think you're overreacting, or even have the audacity to roll their eyes, but you're in your own personal hell. First-world problems, white whines—call it whatever ...more

Every home cook has their most-hated kitchen task. For me, peeling hard-boiled eggs and garlic are pretty high up there. Actually, peeling just about anything is, but for every annoying job, there's a shortcut to make it easier. From the folks at Household Hacker, here are 10 ...more

In my last quick clip, I demonstrated how to take a bottle of soda and freeze it on command. I received many requests for a more detailed article on this, so here we go. This "super cool" trick works with cans of soda too, not just bottles! Video: . This project was inspired b ...more

Acetone-based nail polish remover is great for removing nail polish, and it's also great for some DIY uses around the home. From eliminating scratches to fixing the consistency of correction fluid, its uses are varied but all effective. With nail polish remover, you can also c ...more

There was recently a case that came to national attention where a gentleman was arrested at an airport for having a watch that looked like a bomb, among other things. As it came out, the watch was, in fact, not a bomb, and the man was just an artist who was probably trying to ...more