Photo de stock - A large Hissing Cockroach sits on the finger of researcher Tina Gasch at the research focus ""Insect Biotechnology"" in Giessen, Germany, 25 June 2013. Different insect species are here for example to be conditioned so that they respond to explosives or drugs. Photo: Boris Roessler | usage worldwide. - Giessen/Hesse/Germany

Photo de stock: A large Hissing Cockroach sits on the finger of researcher Tina Gasch at the research focus ""Insect Biotechnology"" in Giessen, Germany, 25 June 2013.

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