Salmon Can Turn on Night Vision. Why Can’t We?

Most of us can only see certain wavelengths of light our entire lives. So why can salmon switch on night vision? We'll learn how they can reshape their eyes to see into the infrared.

Hosted by: Stefan Chin (he/him)
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Sources:
https://pubmed.ncbi.nlm.nih.gov/16292551/
https://www.cell.com/current-biology/fulltext/S0960-9822(15)01246-4
https://royalsocietypublishing.org/doi/10.1098/rsos.170362
https://source.wustl.edu/2015/11/freshwater-fish-amphibians-supercharge-their-ability-to-see-infrared-light/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3546623/
https://link.springer.com/article/10.1007/s10750-022-04932-7
https://askabiologist.asu.edu/rods-and-cones
https://thebrain.mcgill.ca/flash/d/d_02/d_02_m/d_02_m_vis/d_02_m_vis.html
https://thebrain.mcgill.ca/flash/i/i_02/i_02_m/i_02_m_vis/i_02_m_vis.html#2
https://thebrain.mcgill.ca/flash/a/a_02/a_02_m/a_02_m_vis/a_02_m_vis.html#2
https://journals.physiology.org/doi/abs/10.1152/jappl.1949.1.11.807

Image Sources:
https://www.gettyimages.com/detail/photo/silhouette-of-a-man-standing-in-a-dark-room-lit-by-royalty-free-image/1178720669?phrase=dark+house&adppopup=true
https://www.gettyimages.com/detail/photo/salmon-in-rays-of-light-royalty-free-image/486139401?phrase=salmon+swimming+underwater&adppopup=true
https://www.gettyimages.com/detail/photo/on-my-way-back-royalty-free-image/1048000862
https://www.nature.com/articles/s41598-020-63997-3
https://www.nasa.gov/directorates/heo/scan/spectrum/overview/index.html
https://www.gettyimages.com/detail/photo/eye-detail-australian-salmon-royalty-free-image/1318624878?phrase=salmon+eye&adppopup=true
https://www.gettyimages.com/detail/illustration/photoreceptor-cells-royalty-free-illustration/836368180?phrase=photoreceptor&adppopup=true
https://commons.wikimedia.org/wiki/File:Leopard_Frog_(30223128018).jpg
https://www.gettyimages.com/detail/photo/recording-heat-loss-at-the-house-royalty-free-image/513904309?phrase=infrared&adppopup=true
https://www.gettyimages.com/detail/photo/cock-salmon-leaping-vertical-royalty-free-image/531973602?phrase=salmon+swimming&adppopup=true
https://commons.wikimedia.org/wiki/File:Leopard_Frog_2_(30223123828).jpg
https://www.gettyimages.com/detail/video/sockeye-salmon-jumping-brooks-falls-in-katmai-national-stock-footage/1406815575?adppopup=true
https://www.gettyimages.com/detail/photo/wild-salmon-underwater-migration-royalty-free-image/1338749711?phrase=salmon+swimming&adppopup=true
https://www.gettyimages.com/detail/illustration/enzyme-vector-illustration-labeled-cycle-and-royalty-free-illustration/1061592944?phrase=enzyme&adppopup=true
https://www.gettyimages.com/detail/video/fresh-organic-carrots-closeup-stock-footage/146234651?adppopup=true
https://www.gettyimages.com/detail/video/close-up-of-salmon-stock-footage/1290473347?adppopup=true
https://www.gettyimages.com/detail/photo/salmon-columbia-river-oregon-royalty-free-image/614738742?phrase=salmon+underwater&adppopup=true
https://www.gettyimages.com/detail/photo/which-is-better-1-or-2-royalty-free-image/1306474551?phrase=vision+test&adppopup=true
https://www.gettyimages.com/detail/video/coho-silver-salmon-stock-footage/1178134504?adppopup=true
https://www.gettyimages.com/detail/photo/night-vision-goggles-on-military-helmet-closeup-royalty-free-image/1404026967?phrase=night+vision+goggles&adppopup=true