I heard a program on my iPod from Radio Lab about laughter. Some scientists don't believe that any animal besides humans laugh. There were a couple of researchers who worked with rats, and they discovered that they could hear rat noises that weren't audible to the human ear using an electronic device that can detect a larger range of sound. At first, they heard the rats chattering while they were playing (inaudible otherwise), then they tickled the rats to see if they would laugh! Sure enough, there it was. Rat laughter. After being tickled the rats would follow the scientist's hand because it wanted more tickling! Sounds very cute. I tried tickling Lucy this morning but she was too wiggly and I needed to feed her. (She got smoked salmon and a little bit of a Reese peanut butter cup. She is spoiled rotten!)
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