Hermione Wrote:
-------------------------------------------------------
> Amongst other things, the article cites the usual
> suspects, e.g.:
>
> - Klerksdorp;

Heinrich, P.V., 2007, South African concretions of controversy:
South African Lapidary Magazine. vol. 39, no. 1, pp. 7-11.
[www.researchgate.net]

Heinrich, P.V., 2008, The Mysterious "Spheres" of Ottosdal,
South Africa. National Center for Science Education Reports,
v. 28, no. 1, pp. 28-33.[1]
[www.researchgate.net]

Yours,

Paul

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