We don't know why we didn't think of it first. A solar powered toothbrush is exactly what we need. After all, your toothbrush sees the rays of the sun all the time, right? Oddly enough --or perhaps not--, we imagined that reading about a solar powered toothbrush wouldn't be interesting enough to give a second glance to, but sure enough, scientists over in Japan have managed to pique our interest. After all, if you create a toothbrush that's energized by solar power and can literally destroy bacteria without toothpaste, well, you deserve some attention.