Did the First Animals Live in a World Without Oxygen?
A new study suggests the answer may be yes.
https://www.airspacemag.com/daily-planet/did-first-animals-live-world-without-oxygen-1-180967792/
Stolper, D.A. and Keller, C.B., 2018. A record of deep-ocean
dissolved O2 from the oxidation state of iron in submarine
basalts. Nature, 553, pages 323–327
Received: 10 July 2017, Accepted: 02 November 2017
Published online: 03 January 2018
https://www.nature.com/articles/nature25009
yours,
Paul H.