They live an average life of 1,000 days. The maximum days a rat could live is 2,000 days. The rats live in groups in the wild. The rat groups are called packs . In these rat packs there can be 60 or more rats.
Rats carry their young for twenty-two days.
A rat may rear its young in between floors and walls. It also may burrow itself in the ground. It cares for its young by providing its young with milk and bathing them. Some other interesting facts are the rats' heart beats 260-600 times in one minute. The Norway rats are excellent swimmers and divers.