| Roberto | Berni Canani | UNiversità degli Studi di Napoli Federico II Napoli Italia | Italy | Immunology and Microbiology | pediatria | worldtopscientists.com |
| Roberto | Simoni | Federal University of Santa Catarina | Brazil | Engineering | Robotics | worldtopscientists.com |
| Robert | Clarke | University of Oxford | United Kingdom | Medicine and Dentistry | Epidemiology and Population Health | worldtopscientists.com |
| Ritu | Tanwar | NIT Uttarakhand | India | Engineering | Artificial intelligence | worldtopscientists.com |
| risto | kosonen | Aalto University | Finland | Engineering | HVAC and ventilatio | worldtopscientists.com |
| Rima | Isaifan | Cambridge C University | Qatar | Environmental Science | Air pollution and human health | worldtopscientists.com |
| Rim | Temani | Office National des Mines | Tunisia | Earth and Planetary Sciences | biostratigraphie et micropaleontologie | |
| Rim | Bourgi | Strasbourg university | France | Dentistry | Esthetic and Prosthetic Dentistry | worldtopscientists.com |
| 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 | Silva | Physics/UFTM | Brazil | Materials Science | Condensed Matter Physics | |
| 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 |