Viviane Callier is a freelance science journalist based in Maryland. She has written for Quanta, Scientific American, The Boston Globe, The Atlantic and other publications. She was a Churchill Scholar at the University of Cambridge, where she studied zoology, and she has a Ph.D. in biology from Duke University.
Viviane Callier
Science writer
From this contributor
Mitochondria set ‘ancient’ metabolic thermostat for sleep in flies, separate from circadian rhythms
During waking hours, a specialized set of sleep neurons in the fly brain accumulates reactive oxygen species, which eventually trigger sleep to clean up and repair the damage they do.
Mitochondria set ‘ancient’ metabolic thermostat for sleep in flies, separate from circadian rhythms
By
Viviane Callier
9 September 2025 | 7 min listen
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