WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Laboratory rats. A pair of white laboratory rats, Rattus norvegicus, await experimentation. These are albino rats bred from the original brown rat or Norway rat. Apart from laboratory mice, the white rat is the commonest mammal used in animal experimentation. For research purposes, animals may be used to test the safety of non-medical substances such as pesticides and cosmetics, or to test the effects of new medical products. The physiology of the white rat is in many respects similar to human physiology. However, the suffering caused by animal experimentation, particularly in non-medical research, has led to calls for legislative control.
Model release not required. Property release not required.