"Fire in the hole!" shouts an engineer as a detonator sparks. A second later, the shockwave and the thunder–a close shave with the last sight some people ever saw. The video apparently depicts work on Indianapolis' sewer system.
WATCH: shockwave in a tunnel
Here's why a tippe top will spin on its narrow end
Matthias Wandel explains how this self-inverting spinning top will flip over when spun quickly enough. If you have a lathe, Matthias shows you how to make your own: If you don't have a lathe, you can buy plastic ones and even fancy metal ones, spelled variously as tippie tops or tippy tops. Image: YouTube /… READ THE REST
This company makes windows that convert to balconies
HofmanDujardin makes Bloomframe windows that work like a Murphy bed, opening up into a balcony. The only disconcerting part might be the pane of glass that doubles as a floor. That might trigger guests' vertigo, and walking around on it seeks it might scuff or scratch it. I would cut a piece of carpet for… READ THE REST
Could we actually build a space elevator?
Real Engineering takes a look at the feasibility of space elevators, and the short answer is, yes it is possible. It is primarily a materials challenge; namely, a tensile strength challenge for the cable that engineers would need to solve. Any space elevator would have to be situated on the equator, and we would first… READ THE REST
This 1080p pocket-sized projector may just be your new media hub at home or on the road
Pocket-sized projectors have really grown up in the last few years. Previously under-powered and under-resourced, manufacturers have upped the game on these handheld projectors, with many now offering brighter, clearer images, increased functionality and connectivity as well as the ability to effectively become a portable home media center. And with movie theaters still mired in… READ THE REST
These 20 apps are on sale at Cyber Monday prices right now for an extra 40% off
We know you've had plenty on your mind the last few months, but…have you thought about your holiday shopping yet? Yeah, probably not. With everything going on, it's probably easy to forget that even though the holidays are bound to look a lot different this year, the shopping will still need to happen regardless. With… READ THE REST
Save an additional 60% off these best-selling online training courses and bundles
Learning never stops. Not if you're doing it right, anyway. Whether you're trying to add to your professional resume or just pick up a new skill or two to tinker with on the side, there's undoubtedly an online learning package to help you achieve your mission. And you shouldn't have to pay a lot of… READ THE REST
