A 12-billion-year-old fossil found inside the Milky Way

AD | Get started with Brilliant’s tutor for free at https://brilliant.org/drbecky and save 20% off an annual subscription | Hubble just added a chapter to the Milky Way’s entire origins story, and we’ve got to talk about it. Because this month, Massari and collaborators published this research paper claiming to have found evidence for another galaxy merger in the Milky Way’s past, nearly 12 billion years ago. The Milky Way is our home, a galaxy of 100s of billions of stars, including the Sun a