Pain analysis. Close-up of a laboratory rat's foot having increasing pressure applied to it, to test the animal's pain threshold. As soon as the rat i

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Pain analysis. Close-up of a laboratory rat's foot having increasing pressure applied to it, to test the animal's pain threshold. As soon as the rat indicates it is in pain, the weight placed on the foot is measured and recorded.

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Size: 5160px × 3396px
Photo credit: © PHILIPPE PSAILA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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