Troll_Whisperer on 14 February 2013
I don't know about the sixes, I only see two so I don't know how many you're supposed to see, lol. Maybe it's just three?
Edit: this is what is says:
(a) Viewers with normal color vision should see the numeral '6′. (b) Changing lightness of background improves contrast.
http://www.nature.com/nmeth/journal/v8/n6/full/nmeth.1618.html
Face it, you're partially colour blind :P
No troll is too much for me to handle. I rehabilitate trolls, I train people. I am the Troll Whisperer.
