Counting Species out of Thin Air

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Recent proof-of-concept studies showed that researchers were able to survey animals in an area simply by vacuuming up DNA in the air.

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Sources:
https://www.sciencedirect.com/science/article/pii/S2351989418303500
https://www.cell.com/current-biology/fulltext/S0960-9822(21)01650-X
https://www.nature.com/articles/s42003-021-01760-8
https://www.eurekalert.org/news-releases/938583
https://www.cell.com/iscience/fulltext/S2589-0042(21)01487-5
https://www.eurekalert.org/news-releases/938146

Image Sources:
https://svs.gsfc.nasa.gov/14016
https://www.istockphoto.com/photo/scientist-ecologist-taking-a-water-sample-in-the-forest-gm1125152554-295666979
https://commons.wikimedia.org/wiki/File:EDNA_Water_Sampling_(36024122736).jpg
https://www.istockphoto.com/photo/vacum-cleaner-hepa-13-filter-xxxl-gm450453997-30123416
https://www.cell.com/current-biology/fulltext/S0960-9822(21)01650-X#secsectitle0015
https://commons.wikimedia.org/wiki/File:Bog_turtle_survey_team_discussing_the_turtles_(8426057485).jpg
https://commons.wikimedia.org/wiki/File:Tyrannosaurus_Rex_Holotype.jpg
https://commons.wikimedia.org/wiki/File:Citipati_embryo.jpg
https://www.eurekalert.org/multimedia/811758
https://www.eurekalert.org/multimedia/811756
https://www.istockphoto.com/photo/hatching-gm1130236156-298847075
https://www.istockphoto.com/photo/aerial-view-on-spacious-pine-forest-at-sunrise-gm495508534-78024685