One of our most popular episodes of all time was our Colors episode, where we introduced you to a sea creature that could see a rainbow far beyond what humans can experience.
Peacock mantis shrimps are as extraordinary as they are strange and boast what may well be the most complicated visual system in the world. They each have 16 photoreceptors compared to our measly three. But recently researchers in Australia put the mantis shrimps’ eyes to the test only to discover that sure, they can SEE lots of colors, but that doesn't mean they can tell them apart.
https://www.wnycstudios.org/podcasts/radiolab/episodes/211119-colors
https://www.wnycstudios.org/podcasts/radiolab/articles/rippin-the-rainbow-an-even-newer-one