An appreciation of Diether Neubert and Hans-Joachim Merker's contributions to Reproductive and Developmental Toxicology on their 80th birthday

Diether Neubert, toxicologist, and Hans-Joachim Merker, histopathologist and embryologist, made significant contributions to the field of Developmental and Reproductive Toxicology. They worked under the same roof at the Institute of Toxicology and Embryopharmacology in Berlin, and actively collaborated with each other for over 25 years. Both scientists are now retired and turned 80 this year (2009). This celebratory article reports some remarkable events of their long and prolific scientific careers.