Spray It and Hear It

Antennas have been around for decades and are a necessity for wireless communication of any sort.  The old TV antennas which used to be seen on most homes have given way to cable or satellite dishes.  And many antennas are bulky and large. Now scientists have developed an antenna that is thinner than human hair and that can be sprayed onto any surface and used to capture waves of energy.  Read this fascinating article from newatlas.com about these sprayable antennas.

Four Dimensions, Imaginary Numbers and Algebra

Algebra is used in multiple fields worldwide. But how did the discovery and pursuit of four dimensions and algebra spark a breakthrough in algebra?  This article in Wired has some interesting insights.