A group of rats is called a mischief (how cute is that?!)
A rat can go longer without water than a camel.
Rats are even cleaner than cats.
Rats "laugh" when they play, and are even believed to be ticklish.
Studies show that rats feel empathy, and will help another member of their group who is sick or injured.
Rats are very smart and will learn their names as well as any number of tricks.
The first animal in space was a rat.
Rats bond closely with their human companions and get excited to see you just like any other pet.
Rats can be trained to detect tuberculosis.
Rats have been trained to detect land mines because they are small enough that they don't set off the mines.
If you're interested in the last two facts, click here to learn more about HeroRats
Rats have longer short-term memory than humans!
A study done by Indiana University found that rats have incredibly long lasting short-term memory processes.