The Digital Library of Indigenous Science Resources (DLISR) is a library collection of online text, video, audio, and image files of Indigenous science. According to the DLISR, Native or Indigenous Science "involves Native persons learning about and understanding the natural world (or non-Native persons learning about and understanding the natural world in the same ways Native people do)." The library includes knowledge about the natural world as well as methods of teaching and learning about the natural world. All the resources found in the DLISR are authored or produced by Indigenous persons or organizations, or are "approved for inclusion in the library collection by an elder or other Indigenous person with the expertise to assess the resource." Visitors will note that the National Science Foundation (NSF) is one of the supporters of this digital library, and they can find more information on Indigenous or Native Science by checking out the "Introduction" tab at the top of the page. The overarching categories available in the library are "Climate Change", "Education", "Law", "Sovereignty", "Traditional Knowledge" and "Traditional Foods". There are approximately two dozen subtopics for visitors to choose under the categories. For example, under the "Traditional Foods" category visitors will find five resources, including one entitled "Alaska Traditional Knowledge and Native Foods Database", which contains measurements of contaminants found in the animals harvested by Alaska Natives.