Summary
Astronomers have discovered evidence of the Milky Way's earliest act of galactic cannibalism, finding a "scar" at its heart left by a dwarf galaxy devoured approximately 12 billion years ago. This discovery, made using globular clusters and Hubble data, pushes back the known history of the Milky Way's mergers by 1.8 billion years and reveals a previously unknown event named Low-energy-Kraken-Heracles (LKH).