https://www.forbes.com/sites/jamiecartereurope/2020/11/14/our-milky-ways-biggest-meal-was-the-kraken-galaxy-not-the-gaia-sausage-say-scientists/?sh=cb92d6a12a0a
The first complete family tree of our home galaxy has been reconstructed by an international team of astrophysicists. They used artificial intelligence to decipher the movements of the 150 globular clusters that orbit the Milky Way.
In doing so they’re uncovered a massive collision billions of years ago between our galaxy and what they’ve dubbed the “Kraken” galaxy, an event that added millions of stars to the Milky Way.