Original sentence: Fuzzballs are theorized by some string theory scientists to be the true quantum description of black holes.The theory replaces the singularity at the heart of a black hole by positing that the entire region within the black hole’s event horizon is actually a ball of strings, which are advanced as the ultimate building blocks of matter and energy.Whereas the event horizon of a classic black hole is thought to be very well defined and distinct, Mathur and Lunin further calculated that the event horizon of a fuzzball should be very much like a mist: fuzzy, hence the name “fuzzball
Edited sentence: Fuzzball theory replaces the singularity at the heart of a black hole by positing that the entire region within the black hole’s event horizon is actually a ball of strings, which are advanced as the ultimate building blocks of matter and energy.Fuzzballs are theorized by some superstring theory scientists to be the true quantum description of black holes.Whereas the event horizon of a classic black hole is thought to be very well defined and distinct, Mathur and Lunin further calculated that the event horizon of a fuzzball should, at an exquisitely small scale (likely on the order of a few Planck lengths) be very much like a mist: fuzzy, hence the name “fuzzball