And Russians see two different colors where Westerners only see "Blue". http://www.pnas.org/content/104/19/7780.full http://www.pnas.org/content/104/19/7780.fu

And Russians see two different colors where Westerners only see "Blue". http://www.pnas.org/content/104/19/7780.full http://www.pnas.org/content/104/19/7780.full There are more examples.