Nilsson’s eyes, of which he has two, are ice blue and forward facing. In contrast, the box jelly boasts 24 eyes, which are dark brown and grouped into four clusters called rhopalia. Nilsson ...

The blue, which is the shortest wavelength of visible light, bounces back out, meets our eyes, and results in a deep aqua color. Should never walk on any ice alone. The risk of slipping on the ice ...