AFP通信のインスタグラム(afpphoto) - 11月26日 20時01分

Scientist Dr Robert Krickl poses behind his crystal structure model, registered as largest model of this type at the Guinness Book of Records, at the city hall in Vienna, Austria on November 23, 2015. The model is a cube with an edge length of 3,1 meters, consisting of 38,880 balls of red and white colour and, when put side by side, nearly 10 km of connecting sticks. It visualises the arrangement of atoms in crystals, concretely the NaCl-structure-type, magnified almost a billion times. AFP Photo by Joe Klamar

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