| Manuel | Bethencourt | University of Cadiz | Spain | Materials Science | Earth and Planetary Sciences | worldtopscientists.com |
| Manuel | Correia | UNICAMP | Brazil | Energy | Reservoir Geoengineering | worldtopscientists.com |
| Manuela | Bombana | Univeristy Hospital Heidelberg | Germany | Health Professions | Health Services Research | worldtopscientists.com |
| M Mar | Villamiel | CIAL (CSIC-UAM) | Spain | Agricultural and Biological Sciences | Ciencia y Tecnología de los Alimentos | worldtopscientists.com |
| Marcelo | Prado da Silva | Instituto Militar de Engenharia | Brazil | Materials Science | Biocerâmicas | worldtopscientists.com |
| Marcos | Delgado | Institute of Intensive Care Medicine, University Hospital Zurich | Switzerland | Health Professions | Intensivmedizin | worldtopscientists.com |
| Maria | Hedman-Lagerlöf | Karolinska institutet | Sweden | Psychology | clinical psychology, chronic pain, internet-delivered therapy, blended therapy | worldtopscientists.com |
| MARIA | HRMOVA | Adelaide University | Australia | Biochemistry, Genetics and Molecular Biology | Computational biology | worldtopscientists.com |
| María Inmaculada | Mohino-Herranz | INTA | Spain | Engineering | Inteligencia Artificial | worldtopscientists.com |
| maria livia | ognean | Lucian Blaga University Sibiu | Romania | Biochemistry, Genetics and Molecular Biology | Genetics | worldtopscientists.com |
| Maria | Morales-Suárez-Varela | Valencia University (Spain) | Spain | Pharmacology, Toxicology and Pharmaceutical Science | medicine and pharmacy | worldtopscientists.com |
| María Salomé | Álvarez | Universidade de Vigo | Spain | Chemical Engineering | química | worldtopscientists.com |
| Marija | Koprivica | Institute for Technology of Nuclear and Other Mineral Raw Materials | Serbia | Environmental Science | Waste Management and Biosorption | worldtopscientists.com |
| Marília | Dourado | Faculdade de Medicina -Universidade de coimbra | Portugal | Medicine and Dentistry | Medicina Paliativa e Medicina da Dor | worldtopscientists.com |
| Mario | Flores | University of Texas at San Antonio | United States | Biochemistry, Genetics and Molecular Biology | Computational Biology | worldtopscientists.com |
| Maritza Felisa | Díaz Gómez | Universidad Andres Bello, Escuela de Química y Farmacia | Chile | Chemistry | Ciencias Farmacéuticas, Profesional de la Salud | worldtopscientists.com |
| Marius | Manole | UMF “Iuliu Hatieganu” Cluj-Napoca | Romania | Dentistry | Biomaterials | worldtopscientists.com |
| Mark | Korang Yeboah | University of Duisburg Essen | Germany | Engineering | Biochemical Engineering | worldtopscientists.com |
| Marta C | Monteiro | Universidade Federal do Pará | Brazil | Pharmacology, Toxicology and Pharmaceutical Science | Saúde, Ciências Farmacêuticas, Produtos naturais | worldtopscientists.com |
| Marta | Kwiatkowska | Military Institute of Medicine | Poland | Medicine and Dentistry | Otolaryngology | worldtopscientists.com |