We looked inside a space rock and found molecules that look way too organized to be an accident.
March 20, 2026
Original Paper
Composition and higher-order structure in nucleic acids sequenced from a chondrite
bioRxiv · 10.64898/2026.01.26.701670
The Takeaway
While space-borne organic molecules have been found before, this study used actual sequencing to show these molecules possess complex, organized structures that don't match any known life on Earth or typical contamination. It suggests a 'grammar' of chemical sequences that exists outside of known biology.
From the abstract
The known tree of life occupies an infinitesimal region of the space of all mathematically possible evolutionary histories, yet our sequence analysis frameworks are implicitly calibrated to it and to its associated compositional and grammatical regularities. Here we analyze nucleic acid molecules sequenced from the Zag meteorite as part of a broader effort to understand how nucleic acid sequence composition and higher-order structure are shaped under chemically divergent environments. We charact