YouTube user magx1 builds a lot of home-made gas lasers, running electric current through sealed tubes filled with various gases. When you do that, you get the gas atoms all riled up and their electrons absorb energy. Eventually, that energy gets released in the form of directional, highly focused light—a laser. There's a bit more to it than that, but you've got the idea.
One type of laser magx1 builds is called a carbon dioxide laser, though it actually contains a mixture of carbon dioxide, nitrogen, hydrogen and helium. In this video, the carbon dioxide in the mix is coming from his own breath.
By exhaling into my 'supply' balloon, I was able to get pretty good results considering! Unlike a 'proper' laser mix of CO2, N2, and He; the 'breath' trick appears to have a much narrower pressure range over which lasing will occur. But I like it anyway - it doesn't get much more DIY than this!
Researchers at UC Riverside and Centro de Investigación Científica y de Educación Superior de Ensenada have published a paper describing their ongoing success in setting a “transparent nanocrystalline yttria-stabilized-zirconia” into patients’ skulls, which reveal the patients’ brains so that the patients’ brains can be zapped with therapeutic lasers.
One million miles from Earth, hanging in space between Earth’s gravitational pull and the sun’s, is the DSCOVR satellite and NASA’s incredible EPIC camera. Every two hours, EPIC takes a photo of Earth “to monitor ozone and aerosol levels in Earth’s atmosphere, cloud height, vegetation properties and the ultraviolet reflectivity of Earth.” The above video […]
In Botswana, conservation scientists from the University of New South Wales are painting eyes on the rear ends of cattle in an effort to deter lions from eating them. As the lions’ protected habitats shrink, they move closer to human settlements. In Botswana, the lions attack the livestock that the subsistence farmers count on. That […]
3D printers are hot, but they’re also pricey. While the prospect of cranking out everything we can dream up is enticing, cost is often one factor that keeps us from jumping onto the 3D printing train.Now, thanks to M3D, that doesn’t have to be the case. You can now get its flagship 3D printer–plus four reels of filaments–for just […]
It’s no secret that technology is changing the way we all work—but it’s also transforming the way we play. The games of today look nothing like those of 10 or even 20 years ago: these days it’s all about mobile and 3D. And now you can learn to design 3D mobile games with the Intro to Unity 3D Game […]
Earbuds are fine for casual listening while you work out or run errands. But when you really want to experience music as it was intended, nothing beats a serious set of noise-canceling, soundscape-enhancing headphones.The REMXD On-Ear Bluetooth Headphones offer high-quality sound with complete wireless connectivity — and at just $35.99, this rechargeable set won’t even cut into […]