Stable Morris Thorne wormholes supported by non-exotic matter
https://www.worldscientific.com/doi/abs/10.1142/S021988782150170X
Infrastructure Design Concepts for Space Permanence
https://www.proquest.com/openview/4fca83dcd733e27e9e80b2e2b10c0e00/1
Expert habitat: a colonization conjecture for exoplanetary habitability via penalized multi-objective optimization-based candidate validation
https://link.springer.com/article/10.1140/epjs/s11734-021-00208-8
Goldilocks planets ‘with a tilt’ may develop more complex life
https://phys.org/news/2021-07-goldilocks-planets-tilt-complex-life.html
On the applicability of Benford law to exoplanetary and asteroid data
https://www.sciencedirect.com/science/article/abs/pii/S1384107621000865
New Giant Planet beyond the Snow Line for an Extended MOA Exoplanet Microlens Sample
https://arxiv.org/abs/2107.03400
The CARMENES search for exoplanets around M dwarfs — Planet occurrence rates from a subsample of 71 stars
https://arxiv.org/abs/2107.03802