http://www.nasa.gov/mission_pages/spitzer/...r-20080110.html
NASA's Spitzer Space Telescope has detected plump black holes where least expected -- skinny galaxies.
Like people, galaxies come in different shapes and sizes. There are thin spirals both with and without central bulges of stars, and more rotund ellipticals that are themselves like giant bulges. Scientists have long held that all galaxies except the slender, bulgeless spirals harbor supermassive black holes at their cores. Furthermore, bulges were thought to be required for black holes to grow.