# \#astroarchaeology

**URL:** https://scanalyst.fourmilab.ch/tag/astroarchaeology/3620.md

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## [Paul Davies and James Benford on Alien Artefacts in the Solar System and a Shadow Biosphere on Earth](https://scanalyst.fourmilab.ch/t/paul-davies-and-james-benford-on-alien-artefacts-in-the-solar-system-and-a-shadow-biosphere-on-earth/2613)

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**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 0\
**Last updated:** [16 January 2023 14:12 UTC](https://scanalyst.fourmilab.ch/t/paul-davies-and-james-benford-on-alien-artefacts-in-the-solar-system-and-a-shadow-biosphere-on-earth/2613 "2023-01-16T14:12:14Z")

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