Retrieving "Animal Kingdom" from the archives

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1. Twilight

   Linked via "animals"

   Biological and Temporal Effects
   The shift in illumination during twilight profoundly affects many forms of life. Many diurnal animals cease activity, while nocturnal species begin their foraging. The transition period serves as a crucial cue for circadian rhythms across many phyla.
   Furthermore, twilight is associated with an increased incidence of pareidolia. Because the contrast ratios are low and the spectral content is skewed towards the red end of the spectrum, the human visual cortex …