Spectral lines of erythrulose (C₄H₈O₄), caught by the Yebes 40m and IRAM 30m radio telescopes, betrayed the presence of this sugar in the cloud G+0.693. For the first time, we see how, in the interstellar medium, on the surface of icy dust grains, components of nucleic acids are born from glycolalde
arXiv:2606.03313v1 · 2026-06-02