Astrobiology

Laser desorption mass spectrometry with an Orbitrap analyser for in situ astrobiology – Arevalo et al. – Nature Astronomy

Signatures of Life Detected in Images of Rocks Using Neural Network Analysis Demonstrate New Potential for Searching for Biosignatures on the Surface of Mars – Corenblit et al. – Astrobiology

Polarized Signatures of a Habitable World: Comparing Models of an Exoplanet Earth with Visible and Near-infrared Earthshine Spectra – Gordon et al. – preprint

Inferring the rate of technosignatures from sixty years of nondetection – Grimaldi – preprint

Biosignature Line Ratios of [P II] in Exoplanetary and Nebular Environments – Hoy et al. – preprint

Photosynthetic Fluorescence from Earthlike Planets around Sunlike and Cool Stars – Komatsu et al. – The Astrophysical Journal

The photochemical evolution of polycyclic aromatic hydrocarbons and nontronite clay on early Earth and Mars – Kopacz et al. – Icarus

The Breakthrough Listen Search for Intelligent Life: A Laser Search Pipeline for the Automated Planet Finder – Zuckerman et al. – preprint

The Search for Extraterrestrial Life as We Don’t Know It – Scoles – Scientific American

Biochemistry

Experimental Tests of the Virtual Circular Genome Model for Non-enzymatic RNA Replication – Ding et al. – preprint

Physical non-equilibria for prebiotic nucleic acid chemistry – Ianeselli et al. – Nature Reviews Physics

Emergence and maintenance of stable coexistence during a long-term multicellular evolution experiment – Pineau et al. – preprint