by Elio — Pic­ture your­self walk­ing in a woods where the branches of the trees are fes­tooned with bou­quets of yel­low ob­jects that on close in­spec­tion look a bit like golf balls, dim­ples and all. This is what you would come across in the beech forests of the south­ern hemi­sphere. The yel­low balls are...