Before you listen, just take a moment to think about how sight works: Light comes out of the sun, bounces off of a tree (or whatever), goes inside of your head, and hits some nerves which send signals to your brain which turns that into an image of a tree (or whatever)... I wouldn't believe it if I weren't looking at this screen and typing these words right now! 

Also, what better medium to talk about seeing stuff than a podcast!

SciShow Tangents is on YouTube! Go to www.youtube.com/scishowtangents to check out this episode with the added bonus of seeing our faces! 

Head to www.patreon.com/SciShowTangents to find out how you can help support SciShow Tangents, and see all the cool perks you’ll get in return, like bonus episodes and a monthly newsletter!

And go to https://store.dftba.com/collections/scishow-tangents to buy your very own, genuine SciShow Tangents sticker!

A big thank you to Patreon subscribers Garth Riley and Tom Mosner for helping to make the show possible!

Follow us on Twitter @SciShowTangents, where we’ll tweet out topics for upcoming episodes and you can ask the science couch questions! 

While you're at it, check out the Tangents crew on Twitter: Ceri: @ceriley Sam: @im_sam_schultz Hank: @hankgreen

[Trivia Question]

Colossal squid eye size

https://www.tepapa.govt.nz/discover-collections/read-watch-play/science/anatomy-colossal-squid/eyes-colossal-squid

https://ocean.si.edu/ocean-life/invertebrates/largest-eye-world-giant-squid

[Fact Off]

Climbing vine can mimic plastic plant leaves

https://www.nature.com/articles/s41598-021-02229-8

https://www.nationalgeographic.com/science/article/the-sneaky-life-of-the-worlds-most-mysterious-plant

Ogre-faced spider eye membrane regeneration 

https://www.jstor.org/stable/77314

https://australian.museum/learn/animals/spiders/how-spiders-see-the-world/

https://entnemdept.ufl.edu/Creatures/MISC/SPIDERS/ogre_faced_spider_Deinopis_spinosa.htm

https://bionumbers.hms.harvard.edu/bionumber.aspx?id=116061

[Ask the Science Couch]

Human visible spectrum & eye evolution

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5093619/

https://www.sciencedaily.com/releases/2014/12/141218210100.htm

https://journals.plos.org/plosgenetics/article/info%3Adoi%2F10.1371%2Fjournal.pgen.1004884

https://genomebiology.biomedcentral.com/articles/10.1186/gb-2005-6-3-213

https://royalsocietypublishing.org/doi/10.1098/rspb.2013.2995

https://www.theguardian.com/science/2002/may/30/medicalscience.research

[Butt One More Thing]

Tadpole butt eye transplant

http://jeb.biologists.org/content/216/6/1031

https://slate.com/technology/2013/03/tadpole-eye-transplants-reveal-neuroplasticity-in-tufts-lab.html