Ancient Earth had a thick, toxic atmosphere like Venus—
until it cooled o! and became liveable, November 26, 2020
[theconversation.com]
[www.newscientist.com]

The paper is:

Sossi, P.A., Burnham, A.D., Badro, J., Lanzirotti, A.,
Newville, M. and O’Neill, H.S.C., 2020. Redox state of
Earth’s magma ocean and its Venus-like early
atmosphere. Science Advances, 6(48), p.eabd1387.
[advances.sciencemag.org]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)