[ On Scene ] "JANG YOUNGSIL: THE GREATEST SCIENTIST OF JOSEON"PRESS CONFERENCE The historical figure who made science of the Joseon Dynasty, the greatest in the world... His name? JANG. Young. sil. He was born into the lowest class of peasants, called ‘historic tale of the man,’ but he broke the barriers and came to work at the royal palace, becoming the greatest scientist of the Joseon Dynasty! We bring you details on the historic tale.