Riyadh, April 13, 2021, SPA -- Prince Sultan bin Salman bin Abdulaziz, Chairman of the Board of Directors of Saudi Space Commission, delivered virtually a lecture today on the occasion of the International Day of Human Space Flight, organized by Russian Geographical Society (RGS). during the lecture, Prince Sultan bin Salman presented a brief on his space flight, the vital role of space exploration in science development, the importance of the first human space flight and how it brought about changes in the whole world. RGS holds a virtual lecture series annually on April 13th, coinciding with the anniversary of the flight of the world's first astronaut. --SPA 19:54 LOCAL TIME 16:54 GMT 0034 www.spa.gov.sa/w1542388