▪ Thales , a Greek mathematician and philosopher lived in Pre-Socratic times around 620-625 BC . He is commonly known as Thales of Miletus as he belonged to Miletus in Asian region . He is also acclaimed to be one of seven Greek sages that left invincible impact upon philosophy and other sciences . Thales unveiled an era not only in world of science but also in philosophy that ’ s why he has been dubbed as “ father of science ”.