If not ?

apple falls in 1665 and reveals one of the most hidden secrets in the world. ever wondered what would have happened if that apple did'nt come down from in front of Newton ? . we would'nt have ended up studying gravity in school . seeing a complex equation one would have thought what if Newton would'nt have discovered this , no need to study those stuff ? . unfortunately for those , some one would have done that great work if not Newton . every one knew if u throw something up , it would defnitely fall down. it was only matter of time when some one takes pain to discover the cause. but the thing is , if u let it for others u wont be doing it ........