Last year, Harvard researchers developed silicone-based robots inspired by sea creatures like squid and octopi. Now, there's a new twist. It seems that they can now either disguise themselves or glow in the dark. Created with 3D printers, colors can be injected into them. Needless to say, the first application can be quite handy for military use, while the second can be used as a visual marker. Fortunately, they are still in experimental stage so we will not get too paranoid. The team is hoping to eventually make them autonomous.