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.

In fact, when two colors are close together - like yellow and yellow-y green - they can’t seem to tell them apart at all.

MORE ON COLORS: There was a time -- between the flickery black-and-white films of yore and the hi-def color-corrected movies we watch today -- when color was in flux. Check out this blog post on how colors made it to the big screen from our director of research, Latif Nasser.

Our original episode was produced by Tim Howard and Pat Walters. This update was produced by Amanda Aronczyk.

Special thanks to Chris Martin of Creative Aquarium Nation, Phil Weissman, David Gebel and Kate Hinds for lending us their colorful garments. Also thanks to Michael Kerschner, Elisa Nikoloulias and the Young New Yorkers’ Chorus, as well as Chase Culpon and The Greene Space team.

Support Radiolab today at Radiolab.org/donate.

Rippin’ the Rainbow an Even Newer One

Radiolab