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Howler monkeys may owe their color vision to leaf hue 
      By  ... https://t.co/o6IeISmRcp. #BasicScience https://t.co/UtR6VICSLo

oxford_virtual: Howler monkeys may owe their color vision to leaf hue By ... https://t.co/o6IeISmRcp. #BasicScience https://t.co/UtR6VICSLo - 2017-02-22 09:08:32