December 25, 2020 updates Posted on December 25, 2020 by Doug Loss High burial efficiency is required to explain mass balance in Earth’s early carbon cycle https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GB006707 Finding exoplanets in the habitable zone with light echoes https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11448/2559345/Finding-exoplanets-in-the-habitable-zone-with-light-echoes/10.1117/12.2559345.short Close stellar encounters kicking planets out of habitable zone in various stellar environments https://arxiv.org/abs/2001.10595 Rendezvous Mission for Interstellar Objects Using a Solar Sail-based Statite Concept https://arxiv.org/abs/2012.12935 Three-dimensional continuum radiative transfer of polarized radiation in exoplanetary atmospheres https://arxiv.org/abs/2012.12992