Yesterday's video of the day over at ArtsJournal is a cut from a TED Talk about octopuses and their almost supernatural talents for camouflage.
What the video doesn't mention: many (all?) octopuses are colorblind. (Check out this paper from 1977 on the subject. It's got that old-science smell.) So how does the octopus change into colors its eyes can't even detect? And change so fast that it can adjust its camouflage for minor changes in the light, like the shadow of a passing cloud?
Read all about it here.