Keeping apples or avocados from browning after being cut is impossible; within minutes of being exposed to air, these fruits (yes, avocado is a fruit) begin to brown. No matter what you try—adding lemon juice, keeping the pits in place, immediately sealing the produce in an airtight bag—brown discoloration always occurs. However, air is not the only reason that foods like apples, avocados, and lettuce brown: it's also due to the knife you're using.
Meringues are a French and Swiss dessert made of whipped egg whites and sugar, and they are light, sweet, and crispy confections. To make traditional meringues, you beat egg whites into soft foamy peaks, and then keep whipping as you gradually add sugar until the peaks become stiff. Once you've reached the right consistency, you bake them at a low temperature in the oven for a long time. They take both technique and time.
There's no shortage of ways to filter water, but it doesn't get much simpler than this. Researchers at MIT have found that you can turn dirty water into drinking water with nothing more than a stick.
Why are people so afraid of risotto? Contrary to what a lot of home cooks seem to believe, it's really not a difficult dish to make yourself. Sure, there's a lot of stirring involved, but it's not nearly the culinary beast it's made out to be. The real deterrent to making homemade risotto isn't that it's hard—it's that it requires a lot of attention. Risotto needs a lot of babying. Part of the process involves standing over it for 20 to 30 minutes at the stove, stirring almost constantly whil...
I have Verizon, America's largest 4G LTE network, as my cell service provider, but there are times when I find myself with a pretty shitty signal, rendering my upload and download speeds substantially slower than usual.
Nikola Tesla is one of the most tragic figures in the history of science, a history that is practically filled to the brim with tragic figures. Francis Bacon, a 16th century philosopher and scientist, caught pneumonia and died because he was trying to stuff snow into a dead chicken. Marie Curie died as a result of her long-term exposure to radioactivity, and her papers from the 1890s are too radioactive to touch without protective gear to this day.
RFID cards are becoming a fairly common way to purchase goods, but they're already widely used to pay fares on buses, trains, subways, and trolleys across various cities. TAP cards are quick and reliable, but it can be a real pain to remember to bring them with you, especially if you weren't planning on using public transportation that day. Luckily, an intrepid tinkerer at Adafruit has managed to find a way to embed an RFID card into her phone, something you're far less likely to leave at home.
Summer is here, and temperatures are rising. Instead of shelling out for an expensive new air conditioning unit, why not build one yourself with a few bucks worth of old computer parts?
Have you ever seen one of those Snapple machines with the lever coin return? I will show you how to get free drinks or snacks out of this type of machine.
If you're not into pork, you probably won't like this particular recipe, and if you're not into raw meat, you may want to avoid this, too. Because this video recipe covers a meal that requires Parma ham, which is ham that is eaten uncooked. You could always dive in and try it out anyway, because it's well worth the experimenting! Plus, there's prawns, fresh salad and lemon juice.
Making a Elephant Toothpaste Volcano!
This tutorial is an on-screen demonstration on how to create a circle that looks like a glass orb using PhotoShop. First make the background black. Then using the elipse took, draw a circle, filled with light grey. Right click on the shape layer and click "Rasterize layer". Select the eliptical marquee tool and make a circle in the grey shape, a little ways in from the edge. Select the area and choose "Layer via cut", click on Layer 2 and delete. Click on Shape 1 and create a contour by choos...
This video features a really cool science experiment that is easy to do and fun to watch. Items you will need are a plastic 2-liter bottle with a sports bottle type cap (the kind you pull up on in order to sip liquids through the top), about a quarter of a cup of water and two matches. First, take the cap off the bottle and pour the water into the bottle before putting the cap back on the bottle. Then, simply open the pull top on the cap (so that when the bottle is squeezed and released air i...
This how-to video is about demonstrating the Leidenfrost effect with methyl alcohol and a penny. To demonstrate the Leidenfrost effect the following items are required:
In this video, Gary from MacMost demonstrates how to select items on a Mac computer. He explains that there are different ways of selecting items, both with the mouse and with the keyboard. Click to select a single item, and click an empty space to clear the selection. Hold Command or Shift to add to a selection or remove items from the selected group. Drag around an area to select multiple items, and use Command and drag to add more areas. To select items in a list, click to select a single ...
Ever heard of the Blink Card Trick? Well, it's an easy way to impress your friends, without having to know much about card tricks. Learn how to perform this card trick, step by step, in this tutorial.
Sure, buying a quilt is fun, but making your own is much cooler! Learn how to design and sew your own quilt by watching this informative video.
A sweet and spicy milk-based tea from India, chai is a tasty alternative to coffee. You Will Need
Do plants wilt at the sight of you? With these tips, anyone can keep a houseplant alive, even you! You Will Need
Want to learn what it really means to put your faith in someone else? Try a trust fall, where one person falls backward, depending upon another to catch them.
Why use store-bought ketchup when you can whip up a healthier, tastier, and cheaper version at home? Watch this video to learn how to make ketchup.
Hak5 isn't your ordinary tech show. It's hacking in the old-school sense, covering everything from network security, open source and forensics, to DIY modding and the homebrew scene. Damn the warranties, it's time to Trust your Technolust. In this episode, see how to build a mini multi-touch table and photo stitch.
You don't need a stove to whip up pasta, soup, vegetables, meat, or even dessert—all you need is a rice cooker! Watch this video to learn how to use a rice cooker to cook foods other than rice.
There are many ways to fix warped vinyl. Here's a ghetto version by using the power of the sun. Qbert experiments on a hot day to see if the double glass trick really works with 2 tables. By heating up the record under two flat surfaces, to where it's kinda bendable, you can reshape it yourself. Just don't get it too hot and melt the LP! It's another reason you need the glass... because with out it, if you leave the record in the sun by itself, it will bend all crazy and wavy.
In this video tutorial, viewers learn how to make a plastic substance. The materials required for this experiment are: 1 bowl of milk, 1 cup of vinegar, pot and mixing spoon. Begin by heating the milk in the pot and heat it at medium heat for several minutes. Then pour the milk into a separate bowl. Now add the vinegar into the milk and stir it. Continue stirring until it forms into a solid mixture. Then drain the liquid. This video will benefit those viewers who enjoy experimenting, and woul...
In this how-to video, you will learn how to make fire without using any matches. You will need Manganese heptoxide and acetone to do this experiment. You will also need a rod, pipette, and glass beaker. Please exercise caution before doing this experiment, as it involves fire. Place the Manganese heptoxide in the glass beaker. Using a pipette, place a few drops of acetone around it. Now, place a drop on top. Be careful, as the Manganese heptoxide will ignite as soon as the drop hits the mater...
Check out this video tutorial to see how to conduct a magic floating boat science experiment.
How can a drug used to treat cancer be effective against viruses, too? The answer lies in the drug's shared target — specifically, cellular components that control the activity of genes. A new research study showed that one such type of drug, histone methyltransferase inhibitors used in cancer clinical trials, has activity against herpes simplex virus, too.
Wherever there are people, the party is sure to follow. Well, a party of microbes, at least. That is what scientists at NASA's Jet Propulsion Laboratory have found after a 30-day microbial observation of the inflatable lunar/Mars analog habitat (IMAH).
The Galaxy S8's AMOLED display is prone to screen burn-in, particularly with the navigation and status bars. But hiding these bars would make it hard to navigate your phone — that's where Pie Controls come into play.
Responding to the emergence of Zika in the US, researchers investigated what type of repellent works best to reduce your odds of a mosquito bite from Aedes aegypti, the mosquito species that spreads the Zika virus.
Whenever I went to the grocery store on a mission for blueberries, I'd inevitably find myself staring at these weird little tomato-looking berries... and wondering what the hell they really were. Tomatoes? Berries? A weird science experiment? Then, I'd set a pint of blueberries in my cart and carry on, forgetting about them for the time being.
When it comes to working with people, the photographer can face quite a challenge. Everyone has a mind of their own, and with these few tips you will know how to advise your subject so they look fantastic in a picture. Join Erin Manning, professional photographer, as she shows us 5 handy tips for working with people.
Check out this video tutorial on how to make cheap dragon wings, controlled by body posture. You can do this project for $18 if you use plastic garbage bags and Scotch tape for the membranes. You'll see how to make very light and strong costume wings. How strong? That strong.
Motion can be studied in different dimensions. Study of motion of a body in a straight line is called motion in one dimension. A falling body can be called as motion in one dimension. Things can also move sideways when they fall at the same time. This is also called as projectile motion and it is a study of motion in two dimensions. When studying projectile motion we can neglect one dimension of the motion and study the other dimension obtaining the results of motion in that dimension. If a b...
This is a video tutorial in the Food category where you are going to learn how to make rock candy in your spare time. For this you will need 4 cups sugar, 2 cups water, small saucepan, wooden spoon, candy thermometer, glass jar, measuring cup, cotton string, a weight to hang on the string, waxed paper and a pencil. Boil water in the saucepan and dissolve the sugar in it. Pour the solution in to the jar. Tie the weight to one end of the string and tie the other end to the middle of the pencil....
Here's a fun experiment you can do that will demonstrate the effects that pressure has on the freezing point of a liquid. You will amaze your friends as you do what seems to be impossible, turning water into ice without sticking it in the freezer.
Show someone you care about them by spending a little extra time on their Christmas card... and in the process, save some money. In this tutorial, learn how to make a pop-up three-dimensional Christmas card for your loved one.
Check out this video to see our Fantastic Foamy Fountain in action. The experiment uses Hydrogen peroxide and dry yeast. Hydrogen peroxide is similar to water but has an extra oxygen atom. This makes it more dangerous, and only adults should handle the hydrogen peroxide.
The Department of Biological Sciences at the University of Alberta brings you this video tutorial specifically relevant to your student laboratory courses, specifically microbiology. If you're a student at any school of biology, this information will be helpful for learning how to perform agarose gel electrophoresis in the lab.
