#👨‍🎓Study Lover📝 Which civilization is known as the oldest in the world? Mesopotamian #📚ପାଠଶାଳା📖 #🎓ପିଲାଙ୍କ ଜାଣିବା କଥା📝 #🔢ପିଲାଙ୍କ ପାଠପଢ଼ା📚 #👩‍💻ସାଧାରଣ ଜ୍ଞାନ😲