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Visible light is only a small part of the electromagnetic spectrum, but some people see more of it than others. Let's take a look at why.

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LINKS LINKS LINKS:

This Place: 
https://www.youtube.com/watch?v=CoLQF3cfxv0

Royal Institution: 
https://www.youtube.com/watch?v=iPPYGJjKVco

Echo Gillette: 
https://www.youtube.com/watch?v=NVhA18_dmg0

SciShow on Enchroma glasses: 
https://www.youtube.com/watch?v=BrEyOkNRzGI

https://theneurosphere.com/2015/12/17/the-mystery-of-tetrachromacy-if-12-of-women-have-four-cone-types-in-their-eyes-why-do-so-few-of-them-actually-see-more-colours/

https://www.psychologytoday.com/us/blog/sensorium/201310/dna-results-positive-tetrachromacy-0

https://www.gopetplan.com/blogpost/can-dogs-and-cats-see-color

https://curiosity.com/topics/astronauts-can-actually-see-cosmic-rays-curiosity/

https://www.downloadtheuniverse.com/dtu/2012/04/monets-ultraviolet-eye.html

https://futurism.com/what-would-the-night-sky-look-like-if-we-could-see-in-all-the-wavelengths-at-once-2