On the homepage of the digital collections, we showcase a series of “featured topics” (also known as “homepage categories”.) As of 2021, we have nine of them: “Women in Science”, “Instruments and Innovation”, and so on. For examples of past Github issues relating to these, see e.g. water, portraits and people, women in science, and so on. When we create a new one, a curator typically provides the developer with a thumbnail cropped from an original TIFF chosen from the digital collections.
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