Teenage sleep research. Teenagers being fitted with actigraphs. These devices are worn on the wrist and record a person's movements - in this case, du

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Teenage sleep research. Teenagers being fitted with actigraphs. These devices are worn on the wrist and record a person's movements - in this case, during sleep. Photographed in Massachusetts, USA.

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Size: 4288px × 2848px
Photo credit: © THIERRY BERROD, MONA LISA PRODUCTION/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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