I have always felt that we were being pretty close-minded in limiting intelligence to the category of things with faces, and it is great to see some research being done in this area.posted by marginaliana at 6:53 AM on June 11, 2009 A nice feel for this, without too much effort, can be had by watching the Private Life of Plants, by David Attenborough (sample YT: a, b, c, and especially d).