Astrobiology

Transfer of Rocks Between Planetary Systems: Panspermia Revisited – Adams et al. – Astrobiology

Astrobiological Implications of Interstellar Material in the Solar System – Davies et al. – Astrobiology

Some Pertinent Issues for Interstellar Panspermia Raised after the Discovery of 1I/‘Oumuamua – Desch et al. – Astrobiology

The CARMENES search for exoplanets around M dwarfs. Variability on long timescales as seen in chromospheric indicators – Fuhrmeister et al. – preprint

Gamma-Ray-Induced Amino Acid Formation in Aqueous Small Bodies in the Early Solar System – Kebukawa et al. – ACS Central Science

Directed Panspermia Using Interstellar Comets – McKay et al. – Astrobiology

Liquid water on cold exo-Earths via basal melting of ice sheets – Ojha et al. – Nature Communications

Solid-Phase Microextraction for Organic Contamination Control Throughout Assembly and Operational Phases of Space Missions – Royle et al. – Astrobiology

Biochemistry

Erythrose and Threose: Carbonyl Migrations, Epimerizations, Aldol, and Oxidative Fragmentation Reactions Under Plausible Prebiotic Conditions – Yi et al. – Chemistry – A European Journal

Biology

A 2-million-year-old ecosystem in Greenland uncovered by environmental DNA – Kjær et al. – Nature

Planetary Sciences

Making the Solar System – Chambers – preprint

Hydrological History of a Palaeolake and Valley System on the Planetary Dichotomy in Arabia Terra, Mars – Dickeson et al. – Journal of Geophysical Research: Planets

Dynamics of the Great Oxidation Event from a 3D photochemical-climate model – Jaziri et al. – Climate of the Past

Synthetic Biology

Reconstitution of a minimal motility system based on Spiroplasma swimming by two bacterial actins in a synthetic minimal bacterium – Kiyama et al. – Science Advances