Thomas Hartung, MD PhD, is professor at Johns Hopkins Bloomberg School of Public Health in Environmental Health & Engineering as well as Molecular Microbiology and Immunology, the Whiting School of Engineering and the School of Medicine In Cellular and Molecular Medicine, as well as Georgetown University, Washington D.C.,  in Environmental Metrology and Policy, and University of Konstanz, Germany, in Pharmacology and Toxicology; he also is Director of Centers for Alternatives to Animal Testing (CAAT) in the US and Europe and Field Chief Editor of Frontiers in AI. He authored 740+ scientific publications with 53,000+ citations (h-index 126) and his COURSERA toxicology classes had 22,000+ active learners.