Illustration 1) A man during the daylight, AI assisted artistic illustration based on my hand-drawn storyboard sketches, manually edited, © Stefan F. Wirth, September 2026. Note: the illustration is part of a fantastic multimedial storyboard, I prepare. What is the natural daily activity pattern of Homo sapiens? And what role does our social way of life play in this? Through a comparative study of primates and extant human hunter-gatherers, D. R. Samson (2026) reconstructs that humans originally led a cathemeral lifestyle, meaning they engaged in flexible sleep patterns. © StefanFWirth Please support me: https://ko-fi.com/sfwirth Reference: https://doi.org/10.1016/j.jhevol.2026.103875

Illustration 2) A man during the night in a city with lights, AI assisted artistic illustration based on my hand-drawn storyboard sketches, manually edited, © Stefan F. Wirth, September 2026. Note: the illustration is part of a fantastic multimedial storyboard, I prepare. What is the natural daily activity pattern of Homo sapiens? And what role does our social way of life play in this? Through a comparative study of primates and extant human hunter-gatherers, D. R. Samson (2026) reconstructs that humans originally led a cathemeral lifestyle, meaning they engaged in flexible sleep patterns. © StefanFWirth Please support me: https://ko-fi.com/sfwirth Reference: https://doi.org/10.1016/j.jhevol.2026.103875