I’m trying to write … so I’m getting distracted – here are the results of my latest distraction.
- They laugh when they are tickled.
- Group theory research shows that rats perform better, measured by running faster, when they are watched by others – humans or rats.
- Rats will help their other cage-mates if they are trapped even when there is no reward for doing so. ( http://www.livescience.com/17378-rats-show-empathy.html)
byron kalies 
Rats are cool. Did you ever see the amazing rat tricks on youtube? They really are amazing.