More on this from CalTech's Konstantin Batygin:
https://www.konstantinbatygin.com/formation-of-the-solar-sys...
Abstract of the Batygin/Laughlin paper with free link to full PDF:
https://www.pnas.org/content/112/14/4214
2017 Interview:
https://audioboom.com/posts/6069597-mystery-of-the-birth-of-...