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DNA molecule.
Finding DNA Tags in AAV Stacks
Mariella Bodemeier Loayza Careaga, PhD | Mar 7, 2024 | 8 min read
Ten years ago, scientists put DNA barcodes in AAV vectors, creating an approach that simplified, expedited, and streamlined AAV screening. 
A close up of a tick held in a pair of forceps, with Kevin Esvelt’s face out of focus in the background.
CRISPR Gene Drives and the Future of Evolution
Hannah Thomasy, PhD | Mar 15, 2024 | 10+ min read
Genetic engineering pioneer Kevin Esvelt’s work highlights biotechnology’s immense potential for good—but also for catastrophe.
Different colored cartoon viruses entering holes in a cartoon of a human brain.
A Journey Into the Brain
Danielle Gerhard, PhD | Mar 22, 2024 | 10+ min read
With the help of directed evolution, scientists inch closer to developing viral vectors that can cross the human blood-brain barrier to deliver gene therapy.
Complete model of fly brain neuron connections
How Larval Fruit Fly Brains Convert Sensory Signals to Movement
Laura Dattaro, Spectrum | Mar 10, 2023 | 4 min read
A wiring map diagrams more than half a million neuronal connections in the first complete connectome of Drosophila and holds clues about which brain architectures best support learning.
Eytan Stibbe wears a headset and a blue shirt while surrounded by computers and other equipment on the International Space Station.
Whenever, Wherever: Taking DNA Amplification Outside the Lab
Hannah Thomasy, PhD | Dec 4, 2023 | 10 min read
Recombinase polymerase amplification lets researchers rapidly replicate DNA in the clinic, in the field, or even in the International Space Station.
ID tags handicap penguins
John Whitfield(ja_whitfield@hotmail.com) | May 18, 2004 | 3 min read
Study finds that birds with flipper bands are late to breed and are less successful at it
Opinion: Torments of tagging
Timothy Bean | Feb 2, 2011 | 3 min read
Is marking the wild animals we study skewing our results? And if so, what can we do about it?
a fuzzy black and tan beetle chews on the bark of a pine tree sapling, whose needles can be seen in the background
Pine Trees’ Fragrances Help Neighbors Battle Bark Beetles
Katherine Irving | Sep 30, 2022 | 5 min read
Polluted air impedes the trees’ ability to read one another’s signals, a study finds.
Vicu&ntilde;as <em>(Lama vicugna)</em> run across the plains in San Guillermo National Park, Argentina.
How Mange Remade an Ecosystem
Shawna Williams | Jul 5, 2022 | 5 min read
A study traces the effects of a mite outbreak from the earth to the heavens.
teabag with green tag on a white background
Spilling the Tea: Insect DNA Shows Up in World’s Top Beverage
Shawna Williams | Jun 14, 2022 | 5 min read
The Scientist speaks with Trier University’s Henrik Krehenwinkel, whose group recently detected traces of hundreds of arthropod species from a sample of dried plants—in this case, the contents of a tea bag.

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