A Stationary Drake Equation Distribution as a Balance of Birth-death Processes
https://iopscience.iop.org/article/10.3847/2515-5172/abeb7b
Spatially resolved spectroscopy across stellar surfaces. V. Observational prospects: Toward Earth-like exoplanet detection
https://arxiv.org/abs/2103.04996
A Harsh Test of Far-Field Scrambling with the Habitable Zone Planet Finder and the Hobby Eberly Telescope
https://arxiv.org/abs/2103.05148
Oumuamua Is Not a Probe Sent to our Solar System by an Alien Civilization
https://arxiv.org/abs/2103.05559
Warp drive basics
https://arxiv.org/abs/2103.05610