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Un jour, la police scientifique récupérera peut-être de l ADN humain dans l air
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Breakthrough (and scary) technology allows scientists to collect DNA from the air
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When an organism sheds DNA into its environment, from land to water to anything it might touch, that genetic material is known as eDNA (environmental DNA), which becomes airDNA when airborne.
“Any biological material can be a source of eDNA,” ecologist Elizabeth Clare, who led a study recently published in
PeerJ, told SYFY WIRE.
Future forensics aside, airDNA could be critical to saving endangered species before their time is up. It could even help discover species we never even knew existed and undiscovered animals are thought to be mostly small creatures that have easily been able to hide from us for so long. Clare and her team saw airDNA in action with naked mole rats that had their own enclosure at an animal facility. They vacuumed the air with filters similar to a HEPA filter you may already have, which your DNA is probably trapped in. They might not be Godzilla, but they are still the first proof of airDNA coming from relatively large animals.
Erster Nachweis von DNA aus der Luft - Tiere und Menschen hinterlassen genetische Spuren auch in der Raumluft
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Mon, 05 Apr 2021 20:27 UTC
© ShutterstockWe leave DNA all over the place, including in the air, and for the first time, researchers have collected animal DNA from mere air samples, according to a new study.
The DNA that living things, human and otherwise, shed into the environment is called environmental DNA (eDNA). Collecting eDNA from water to learn about the species living there has become fairly common, but until now, no one had attempted to collect animal eDNA from the air. What we wanted to know was whether we could filter eDNA from the air to track the presence of terrestrial animals, study author Elizabeth Clare, an ecologist at Queen Mary University of London, said in a video abstract for the study, published Mar. 31 in the journal PeerJ. We were interested in whether we could use this airDNA as a way to assess what species were present in a burrow or a cave where we could not easily see or capture them, she added.