How to Treat a Jammed Finger - Health Sutra - Duration: 1:54. Health Sutra - Best Health Tips 79,423 views
Brown rat. The brown rat, also referred to as common rat, street rat, sewer rat, Hanover rat, Norway rat, Norwegian rat, or wharf rat (Rattus norvegicus) is one of the best known and most common rats.
The pet rat is a domesticated breed of the brown rat (rattus norvegicus). Rats have been domesticated for over 200 years. Selective breeding of many generations of Norway rats over all those years has produced the domestic rat of today which comes in many different colors and markings.