Hay friends welcome back aap sabka बहुत-बहुत Swagat hai To Ham kahan the!! Han Yad aa Gaya. We were talking about some 12 crore years.still here is  remaining some interesting talks about pot black hole.before we  do start of talk about black holes, .we should have take strong  knowledge about. the  Runs of heat and fire!!that how  Runs heat is and how fires are!!Still today we have not seen any traditions  witches has said us  about the Runs of heat  and fire.that, is  fire moves  down or!! what and how heat is  too!So here is  the  revolution that,........My dear  friends