As if they weren't scary enough, scientists have discovered that sharks can become invisible to prey/you using an optical trick. Not scared yet? Well, one of the invisible shark species is nicknamed the phantom hunter of the fjords. Run. Now.
Slaves were creating mosaic objects thousands of years BC, but I bet they never dreamed of a bathtub covered in glittering photo-luminescent mosaic tiles. In fact, I bet they never even knew what a bathtub was.