Study shows some exoplanets may have greater variety of life than exists on Earth
https://phys.org/news/2019-08-exoplanets-greater-variety-life-earth.html
The multiplicity distribution of Kepler’s exoplanets
https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stz2350/5553998
Lamarck and Panspermia – On the Efficient Spread of Living Systems Throughout the Cosmos
https://www.sciencedirect.com/science/article/pii/S0079610719301129
Tidal circularization of gaseous planets orbiting white dwarfs
https://arxiv.org/abs/1908.08052