Earth's Core Appears to Be Wrapped in an Ancient, Unexpected Structure
David Nield, Nature, ScienceAlert, September 8, 2023
[www.sciencealert.com]

The open access paper is:

Hansen, S.E., Garnero, E.J., Li, M., Shim, S.H. and Rost, S., 2023.
Globally distributed subducted materials along the Earth’s core-mantle
boundary: Implications for ultralow velocity zones. Science Advances,
9(14), p.eadd4838.
[www.science.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)