The middle of the Milky Way galaxy is currently a quiet place where a supermassive black gap slumbers,only occasionally slurping small sips of hydrogen gas. But it wasn't always this way. A new study shows that 6 million years ago, when the first human ancestors known as hominins walked the soil, and our galaxy's core blazed forth furiously. The evidence for this active phase came from a search for the galaxy's lost mass.
Source: phys.org