Paul Langerhans (1847-1888): perceiving the unknown and describing it.

Paul Langerhans Jr. described under the microscope single cells and aggregates never seen before; he had broad interests and a non-ordinary biography. He died young from tuberculosis, but continued to study until the end, driven by curiosity and disregarding his fate. In him coexisted the genius of the discoverer and the diligence of the observer of nature.