3 ms·
Not half of woman. More like 2%. https://www.snopes.com/politics/medical/tetrachromacy.asp https://www.snopes.com/politics/medical/tetrachromacy.asp
by sethammons 9y ago
Not half of woman. More like 2%.
https://www.snopes.com/politics/medical/tetrachromacy.asp https://www.snopes.com/politics/medical/tetrachromacy.asp