July 12, 2018 updates Posted on July 12, 2018June 28, 2020 by Doug Loss ‘Where is everybody?’ An empirical appraisal of occurrence, prevalence and sustainability of technological species in the Universe https://www.researchgate.net/publication/325780733_‘Where_is_everybody’_An_empirical_appraisal_of_occurrence_prevalence_and_sustainability_of_technological_species_in_the_Universe Galactic Distribution of Chirality Sources of Organic Molecules https://arxiv.org/abs/1612.06720 Self-Stirring of Debris Discs by Planetesimals Formed by Pebble Concentration https://arxiv.org/abs/1806.05431