Black holes have been observed to swallow gas from its surroundings, which is now thought to underlie the fast pace at which black holes can keep growing for a long period of time.
Astronomers concluded this on the basis of abnormally bright light emitted around a black hole.
They think that they now better understand of how black holes, lying at the heart of essentially every galaxy including the Milky Way, can grow to such enormous proportions.
Read the full story: Tel Aviv University
Scientific publication: Nature Astronomy