A team of astronomers has found evidence for an intermediate-mass black hole in the spiral galaxy NGC 1313 (also known as the Topsy Turvy Galaxy). This image shows the spiral galaxy NGC 1313. The very active state of this galaxy is very evident from the image, showing many star formation regions. A great number of supershell nebulae, that is, cocoon of gas inflated and etched by successive bursts of star formation, are visible. The green nebulosities...