Astronomers are now using the exact same 'family tree' math used to track animal evolution to figure out how galaxies were born.
April 17, 2026
Original Paper
Reconstructing chemical enrichment pathways in disc galaxies: A phylogenetic approach
arXiv · 2604.11974
The Takeaway
Usually, we think of galaxies as big piles of gas and stars, but this research treats them like biological organisms with DNA. By applying 'phylogenetic' methods—the same stuff used to see how humans evolved from apes—researchers can reconstruct the 'evolutionary tree' of a galaxy's chemical history. They look at the chemical signatures of stars as if they were genetic traits passed down through generations of stellar births and deaths. This allows them to build a literal family tree for the Milky Way, showing exactly which 'ancestor' clouds gave birth to which parts of the galaxy. It turns the history of the universe into a massive, solvable genealogy project.
From the abstract
Phylogenetic methods, traditionally used in biology to trace the evolutionary relationships among species, are emerging as a powerful framework to reconstruct evolutionary processes in galaxies from chemical information. We apply galactic phylogenetics to study the chemical evolution of stellar populations in distinct regions of a simulated disc galaxy, assessing its capability to unveil assembly histories. We used a high-resolution simulation that follows the chemical enrichment of an isolated