How to kill a sinus infection in 20 seconds. Few things are worse than a sinus infection. Most people have experienced symptoms of sinusitis like runny nose and facial pain. Symptoms can last for 10 days or 8 weeks. In the worst cases, they can last even longer. According to WebMD, more than 37 million Americans suffer from sinusitis!
Here's a very cool home energy generator that makes electrical power, heat, hot water and air conditioning from a solar thermal panel. This is a featured invention at this years DaVinci Inventor Showcase October 10-11, 2015.
61 Solar Powered Inventions That Will Change The World [2nd Edition]
Need a quick backup battery for your phone? You can make one of these backup phone chargers from just a 9V battery and the guts of a dollar store car charger. I found this particularly clever because it's not obvious that to charge a 5V device, one might take a part a 12v charger and substitute a 9V battery -- but it's the the dollar store electronics that do the voltage matching. Very nice.