Stock Photo - 12 October 2018, Austria, Vienna: A microscope and the world's largest pollen database ""paldat.org"", recorded in the laboratory of the Institute of Botany of the University. (to dpa ""The pollen profilers - with pollen on a manhunt"") Photo: Jan Gott/dpa. - Vienna/Austria

Stock Photo: 12 October 2018, Austria, Vienna: A microscope and the world's largest pollen database ""paldat.org"", recorded in the laboratory of the Institute of Botany of.

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