50.4 MB (1.3 MB compressed)
5147 x 3425 pixels
43.7 x 29.0 cm ⏐ 17.2 x 11.4 in (300dpi)
DAN DUNKLEY / SCIENCE PHOTO LIBRARY DAN DUNKLEY / SCIENCE PHOTO LIBRARY
Sleep research. Patient attached to an electroencephalogram (EEG) machine to measure brain activity during sleep.
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