| Riley | Derby | The University of Texas at Austin | United States | Other | Primatology | worldtopscientists.com |
| Richard | Arias-Hernandez | The University of British Columbia | Canada | Social Sciences | Archival Science | worldtopscientists.com |
| Ricardo | Vasquez Padilla | Fortescue Zero | Australia | Energy | Renewable energy, CSP | worldtopscientists.com |
| Riaz | Ahmad | Qilu Institute of Technology | China | Social Sciences | Social Sciences | worldtopscientists.com |
| Reza | Fotohi | SBU | Iran | Computer Science | Security and Privacy | worldtopscientists.com |
| reyhaneh | nassiri mansour | immunogenetic institue | Iran | Medicine and Dentistry | regenerative medicine | worldtopscientists.com |
| Rengasamy | Parthasarathi | Department of Soil Science and Agricultural Chemistry, Anbil Dharmalingam Agricultural College and Research Institute (ADAC&RI), Trichy. | India | Agricultural and Biological Sciences | Bio surfactant, Biodegradation of LDPE | worldtopscientists.com |
| Renee | Reynolds | University at Buffalo | United States | Neuroscience | Residency Training | worldtopscientists.com |
| RENATO | AMBROSIO, JR | UNIRIO | Brazil | Medicine and Dentistry | Ophthalmology / Refractive Surgery | worldtopscientists.com |
| Regent Retrospect | Musekwa | Botswana International University of Science and Technology | Botswana | Mathematics | Statistics | worldtopscientists.com |
| razieh | davashi | Islamic Azad University, of Najafabad | Iran | Computer Science | Data mining | worldtopscientists.com |
| Rayees | Ahmed | University of Kashmir | India | Earth and Planetary Sciences | Geography | worldtopscientists.com |
| Rayan | M.Ameen | University of Duhok | Iraq | Materials Science | Micromechanical Characterization of α/β Ti-6Al-4V Using FIB-Fabricated Micropillars, Nanoindentation, and EBSD | worldtopscientists.com |
| Ravi | vats | Q32 bio | United States | Biochemistry, Genetics and Molecular Biology | Cell and Molecular biology, Pharmacology | worldtopscientists.com |
| Ravi | Sahu | Wright State University Boonshoft School of Medicine | United States | Pharmacology, Toxicology and Pharmaceutical Science | Oxidized lipid mediators, | worldtopscientists.com |
| Rashid | Gholami | Razi University | Iran | Agricultural and Biological Sciences | post harvest technology | worldtopscientists.com |
| Raquel | Conceicao | Institute of Biomedical Engineering and Biophysics, Faculty of Sciences, University of Lisbon (Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa) | Portugal | Engineering | Biomedical Engineering | worldtopscientists.com |
| raoudha | ben Djemaa | university of sousse | Tunisia | Computer Science | informatique | worldtopscientists.com |
| Rana | Ramadan Fahmy Neiber | Institue of Process Engineering, Chinese Academy of Sciences | China | Environmental Science | Chemical Engineering | worldtopscientists.com |
| Ram | Sagar | Johns Hopkins University | United States | Neuroscience | Genetics, Stem Cell Research | worldtopscientists.com |