We know that black holes exist. One of the types of black holes is roughly on the scale of the mass of our Sun. They form when the large-scale ones die. Then there are supermassive black holes that exist at the centers of galaxies. These can have masses on the scale of millions or billions of times the mass of our Sun. Our Milky Way galaxy has a supermassive black hole that is 4 million times the mass of our Sun. But astronomers have been looking for medium size blackholes. And now, finally, there is evidence of one in a globular cluster in our galaxy. In this episode of Kainaati Gup Shup, astrophysicist Salman Hameed discusses how astronomers discovered this mid-size black hole.