Geologists Question 'Evidence Of Ancient Life' In 3.7
Billion-Year-Old Rocks, NPR, All Things Considered
https://www.npr.org/2018/10/17/658103489/geologists-question-evidence-of-ancient-life-in-3-7-billion-year-old-rocks
"World's Oldest Fossils" Might Actually Be Simple Rocks,
And We're Here For The Drama, Carly Cassella, Science Alert
https://www.sciencealert.com/doubt-raised-over-current-record-holder-oldest-fossil-sign-of-life
The paper is:
Abigail C. Allwood, Minik T. Rosing, David T. Flannery, Joel A. Hurowitz
and Christopher