TOK Topics

“Some women, however, are “tetrachromat”. Thanks to two different mutations on each of the X chromosomes, they have four cones – increasing the combination of colours they should be able to see. The mutation isn’t very rare (estimates of the prevalence vary and depend on your heritage, but it could be as high as 47% among women of European descent), but scientists struggled to find someone who reliably demonstrated enhanced perception.”

http://www.bbc.com/future/story/20160316-i-can-see-colours-you-cannot-perceive-or-imagine?ocid=gnl.ppc.sponsored-post.facebook..KeyWee_March_US&kwp_0=122626&kwp_4=568355&kwp_1=298926