Arctic krill use twilight to guide their daily rhythms through the polar winter (2) (IMAGE)
Caption
Lightscape during Polar Night's “midday twilight” period in Svalbard, containing light from the sun below the horizon, moonlight, aurora borealis, and artificial light.
Credit
Geir Johnsen, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
Usage Restrictions
Credit must be given to the creator.
License
CC BY