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Articles on Phylogenetic tree

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A virus’s genes hold a record of where it’s traveled, and when. imaginima/E+ via Getty Images

Charting changes in a pathogen’s genome yields clues about its past and hints about its future

After a nose swab tests positive for a virus or bacteria, scientists can use the sample’s genetic sequence to figure out where and when the pathogen emerged and how fast it’s changing.
A live Padaungiella lageniformis wiggles its pseudopods. Daniel J. G. Lahr

‘Micro snails’ we scraped from sidewalk cracks help unlock details of ancient earth’s biological evolution

Using the family relationships between single-celled protists alive today, researchers hypothesized what their evolutionary ancestors looked like – and then looked in the fossil record for matches.

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