In this article by Amanda Heidt we learn that Researchers have recently isolated airborne mammalian DNA. This tells that animals leave invisible traces that scientists are able to monitor and work with. This was the first time where airborne samples were used to look at mammals. The first experiment was run using a colony of naked mole rats and this experiment worked better than they had anticipated. There are possible issues that can come up when extracting DNA from the air such as contamination. The airborne DNA could have forensic or public health applications. DNA from crime scenes is often degraded or sparse, but they were able to pull minute traces of the nucleic acid from the air and produce usable results. In another article, they dive deep into the extraction methods used to extract airborne eDNA.