[Rockhounds] Harvard astronomer’s “alien spherules” are industrial pollutants

[Paul]

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.

Yours,

Paul H.