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On Sunday I'm giving a geek talk (rocks how old are they?/stone age inquisition, a follow-up to last year's talk entitled they're all good rocks bront) and so far I have four and a half (4½) bullet points scribbled down in pencil in about February. (Talk will be at 13:30 BST, assuming I don't bail on it, and I imagine I can hand out a Zoom link if you want to try gatecrashing.)

I have belatedly realised that bullet point #5 is "geeky media in which the age of rocks plays an important role", but it's 9.30pm and (I don't know if you've noticed but) it's Bloody Warm and I need to write this tomorrow in practical terms so, er, suggestions gratefully received.

Obvious spoilers (ROCKS ARE IMPORTANT) under the cut and, hopefully, in comments...

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