Harvard astronomer’s “alien spherules” are industrial pollutants

Harvard astronomer’s “alien spherules” are industrial pollutants
Big Think, November 14, 2023
https://bigthink.com/starts-with-a-bang/harvard-astronomer-alien-spherules/

The open access paper is:
Gallardo, P.A., 2023. Anthropogenic Coal Ash as a Contaminant in a Micro-meteoritic Underwater Search. Research Notes of the AAS, 7(10),
p.220.
https://iopscience.iop.org/article/10.3847/2515-5172/ad03f9/meta

Yours,

Paul H.