Hans Braumuller sent his zine and cards from his Artist Matter project.
It is a large A4 zine, with Brain Cell on the front and back covers:
My ancient Greek deer and ELPIDA (= HOPE), made the front cover!
The theme was Global environment, and there were many participants,
and a few of the other entries: Think Global-Act Local:
by Maggi Ruggero,Italy:
by John Bennett and Henning Mittendorf:
stampings by John Held Jr. :
by Clemente Padin, Uruguay: PAZ
RED by Meral, Turkey:
by Uwe Klein, Germany:
An excellent documentary zine,
there were several published essays on mail art , too,
By Clemente Padin, of Uruguay (a few more in the comments section):
and announcement from Hans Braumuller for Artist Matter #2:
deadline: DECEMBER 1, 2020.