At the heart of our home galaxy lurks a gigantic black hole that’s more than a trillion times heavier than Earth, with all that mass stuffed into a region that is about 2,000 times wider than our planet. Now scientists have discovered the behemoth is throwing off a hot breeze. The findings, detailed today in the Astrophysical Journal Letters, suggest not only that all black holes emit such a wind but also that these beasts are not total loners that are isolated from their environments. “We have.