Photosynthesis in near darkness
https://www.awi.de/en/about-us/service/press/single-view/photosynthese-im-fast-dunklen.html

Photosynthetic light requirement near the theoretical minimum detected in #Arctic #microalgae: Clara Hoppe et al. https://www.nature.com/articles/s41467-024-51636-8

"The measurements were carried out as part of the #MOSAiCexpedition at 88° northern latitude... #algae can build up biomass through #photosynthesis as early as the end of March... the sun is barely above the horizon, so that it is still almost completely dark in their habitat under the snow and ice"