R. Samson, David N. Crittenden, Alyssa Mabulla, Ibrahim A. Z. P. Mabulla, Audax L. Nunn, Charles Supplementary Figure from Chronotype variation drives night-time sentinel-like behaviour in hunter-gatherers Epoch-by-epoch illustration of number of awake individuals during the nighttime period sleep;sentinel;chronotype;actigraphy;hunter-gatherer;evolutionary mismatch 2017-06-27
    https://rs.figshare.com/articles/figure/Supplementary_Figure_from_Chronotype_variation_drives_night-time_sentinel-like_behaviour_in_hunter-gatherers/5147254
10.6084/m9.figshare.5147254.v1