This is a little off-topic but still fascinatng: A robot controlled by slime mold.
The Physarum polycephalum slime, which naturally shies away from light, controls the robot's movement so that it too keeps out of light and seeks out dark places in which to hide itself.
Earlier, there was the robot that generated power by catching flies.
I am waiting for the robot that digests tamarisk. I can see it, a twenty-foot high hexapod, slowly grazing along the Arkansas River somewhere downstream from Pueblo, gently raising its mechanical legs over the barbed-wire fences.