Cool! I found recently that it's thought that all the uranium came from an ancient neutron star merger: https://www.space.com/neutron-star-crash-made-gold-ura

Cool! I found recently that it's thought that all the uranium came from an ancient neutron star merger: https://www.space.com/neutron-star-crash-made-gold-uranium.html https://www.space.com/neutron-star-crash-made-gold-uranium.h... https://physicsworld.com/a/radioactive-decay-accounts-for-half-of-earths-heat/ https://physicsworld.com/a/radioactive-decay-accounts-for-ha...