Without the Harvard affiliation I don't think this would make news. It's not been peer reviewed and I don't think the first author is (or claims to be) an expert on the relevant topics. (Hard to say what the relevant topics would be, maybe archeology or geology?)
> This paper has made the case for taking seriously the CTH [“cryptoterrestrial” hypothesis] as a potential explanation for UAP, while noting that it probably ranks lower than other hypotheses, such as the extraterrestrial explanation, although such calculations are hard to quantify.
> All four CTHs are far-fetched on their face; we entertain them here because some aspects of UAP are strange enough that they seem to call for unconventional explanations.
https://www.researchgate.net/publication/381041896_The_crypt...
Without the Harvard affiliation I don't think this would make news. It's not been peer reviewed and I don't think the first author is (or claims to be) an expert on the relevant topics. (Hard to say what the relevant topics would be, maybe archeology or geology?)