PATRICK LANDMANN / SCIENCE PHOTO LIBRARY PATRICK LANDMANN / SCIENCE PHOTO LIBRARY
Testing a laboratory mouse (Mus musculus). Mouse running on an activity wheel while undergoing endurance tests in a laboratory. Endurance tests are often used to analyse the effects of medications and other chemicals that have been administered to the animal. Photographed at the Zentralen Tierlaboratorien (ZTL, Central Animal Laboratory) in Berlin, Germany.
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