Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Credit: Humboldt Penguins. Thermal Vision Research. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/N0038377/full/800%2C/0/default.jpg)
Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Credit: Humboldt Penguins. Thermal Vision Research. Source: Wellcome Collection.