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A simple clue to how hair knows where to grow

So, how does a developing mammal’s skin decide where hair follicles should appear? Researchers at the University of Geneva built a model showing that cells moving in response to chemical signals can spontaneously create the patterns seen in mice and spiny mice. The findings challenge the idea that each new follicle needs to be carefully directed by its neighbours, and suggest that simple local interactions may do the job. Published in PNAS, this work could also shed light on how feathers and scales form their distinctive patterns.
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