tjowens: "These persons are called "tetrachromats," and can see a hundred million colors" http://t.co/kNvkj2Qxyc


5h

“These persons are called “tetrachromats,” and can see a hundred million colors” http://www.digitaljournal.com/article/326976

Article source: http://twitter.com/tjowens/statuses/335799748407742464