This undated photo provided by Elizabeth Turner, Laurentian University, shows a field location in Northwest Territories, Canada....
Thin sections of rock contain three-dimensional structures that resemble modern sponge skeletons....
" I believe these are ancient sponges--only this type of organism has this type of network of organic filaments," said Joachim Reitner, a geobiologist and expert in sponges at Germany's University of Gottingen, who was not involved in the research....
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2021-07-29 00:00:00.0