This week's show about the evolution of intelligence features a segment on the ability of cuttlefish to change the colors and patterns of their skin to match their surroundings. As Roger Hanlon, senior scientist at Woods Hole Marine Biological Laboratory in Massachusetts, describes in "Feather Knows Best", this helpful adaptation has been honed to the point that the cuttlefish can undergo this transformation in the blink of an eye. In the video above, a cuttlefish floats just above the ocean floor, its color ranging from purple to yellow. At about 27 seconds in, it suddenly takes on the colors and pattern of the ocean floor, and if you didn't see it happen, you'd probably swim right by without seeing the animal at all. At least, that's what it hopes.