Can't get liquid nitrogen? Then make some yourself. Check out this instructional science video to learn how to make inexpensive liquid nitrogen. This tutorial video is great for science teachers, physics demonstrators, and science enthusiasts.
I love me some salad, but I'm also kind of a big baby when it comes to eating them. The greens have to be perfectly crisp and fresh, which is why I'm such a nut about storing them properly, including rethinking how I use my refrigerator, using a paper towel or dry cloth to wrap them, or even puffing a little CO2 into the plastic bag to keep them fresh. I've even developed an arsenal of tricks to restore life to soggy greens.
When you don't have a steady cellular signal or immediate Wi-Fi access but need to communicate with others around you, you can set up an off-the-grid voice communications network using a Raspberry Pi and an Android app.
With protests springing up across America, there's a chance you may have your first interaction with law enforcement. Many demonstrators will have their phones in-hand to film the action, which, sadly, could prompt an officer to demand the device and any self-incriminating data it may contain. Before this happens, you should know there are tools at your disposal to protect your data in such situations.
You know it's crazy out there when governments start blocking social websites like Facebook, Twitter and even YouTube. But that's what happened in Egypt, when tens of thousands of anti-government protesters took to the streets on Tuesday (January 25th) in hopes of ending President Hosni Mubarak's 30 years of authoritarian power.
You may have read an earlier post about Egypt blocking popular social websites like Facebook, Twitter and YouTube due to demonstrators disseminating videos and photographs, along with coordinating movements, during the protests against President Hosni Mubarak. In that article, you learned how to use proxy servers and VPN services to bypass those website governmental blocks.
This video teaches you how to prevent bad skin. The demonstrators in the video are two doctors who begin by giving you some quick facts about your skin. They tell you how to perform a test on your skin to see how aged it is. To perform the test you apply scotch tape to various places on your face. When you remove the tape, it will tell you how aged your skin is based on what comes off on the tape. They continue to provide examples of how your skin can be damaged and how moisturizers work. The...
Nemo Concepcion was among the first demonstrators hired by the Duncan Yoyo Company during the Depression and the originator of many tricks. Not your average tutorial video, this is more educational with some interesting yo-yo history and you will still learn how to do some great tricks. Yo-yo.
In what many Americans hope would not happen, thousands of people took to the streets in eastern Afghanistan on Tuesday to protest the killing of 16 civilians by a U.S. soldier, burning an effigy of Barack Obama and calling for the killer to be tried in Afghanistan.
In preparing to use surveillance drones for protests and “public safety,” the Department of Homeland Security is following Russia’s lead, where Vladimir Putin has approved a massive expansion of the technology specifically for the purpose of monitoring demonstrators. » U.S. Follows Russia In Using Drones To Spy On Protesters.
If you've yet to witness B.A.S.E. jumping, it's an activity for adrenaline junkies first publicized by filmmaker Carl Boenish in '78. The freefall sport employs ram-air parachutes, and is most commonly executed in locations such as the highly elevated El Capitan rock formation of Yosemite National Park (El Capitan is also technically the birthplace of the sport).
