Biomed technology is so cool!  In the 1940's it was hypothesized that our ears emit unique sounds based on the vibrations of hair folicles inside. It wasn't until the introduction of supersensitive microphones that these unique ear emission sounds could be detected. A UK scientist is researching whether these unique sounds can be used as an identity verification over the phone much like a retinal scan in person. Read more.

In other invention news...did you know that the birth control pill was invented in Mexico? It's amazing the array of inventions that are high-tech, low-tech, and everywhere in between to save lives, make our days easier, etc. Your invention ideas as worth merit.  Keep inventing peeps!