Animal experimentation. Researcher measuring a growth on a guinea pig (Cavia porcellus) that has developed in response to a recent injection. The inje

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Animal experimentation. Researcher measuring a growth on a guinea pig (Cavia porcellus) that has developed in response to a recent injection. The injection may have been administered to test for the possible carcinogenic effect of a chemical.

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Size: 3626px × 2417px
Photo credit: © LINDA BARTLETT, NATIONAL CANCER INSTITUTE/SCIENCE LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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