Electric Sail Propulsion for Deep Space Missions
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20190032324.pdf
Life on Venus and the interplanetary transfer of biota from Earth
https://link.springer.com/article/10.1007/s10509-019-3678-x
2I/Borisov: A C2-depleted interstellar comet
https://www.aanda.org/articles/aa/full_html/2019/11/aa36959-19/aa36959-19.html
Identifiable Acetylene Features Predicted for Young Earth-like Exoplanets with Reducing Atmospheres undergoing Heavy Bombardment
https://arxiv.org/abs/1911.01643
Wind erosion on Mars and other small terrestrial planets
https://arxiv.org/abs/1911.01692