12 billion years of black hole history, revealed through X-rays and simulations 

 New findings show the black hole at the heart of our Milky Way galaxy had a late growth spurt. 

https://cdn.mos.cms.futurecdn.net/JYtPFt7jfWEGVYKWgPnLJc.jpg

https://www.space.com/x-ray-simulations-universe-supermassive-black-holes