"With an adult body length of only 14 to 16 centimetres, and weighing as little as 120 grams, the endangered pygmy marmoset is one of the smallest primates discovered. They are normally found in the rainforest canopies of South America, but this chap was confiscated in August after being found by police inside the clothes of a Peruvian citizen." From this collection of the best science photos of the year.
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