Australian and Swiss scientists have found that the nano zinc oxide particles did not penetrate beneath the outermost layer of cells.
By Bob Root, Keys Technologist One day when I was young, I was reading an issue of Popular Science Magazine with a story about a bold project to put man into space. I was so excited. Like many young people, I fantasized about flying in space. I became an avid follower of early rocket pioneers and awaited the day when…