Explainer: What is a rock?

Everyone is familiar with rocks. It’s hard not to be. They’re everywhere – we walk on them, skip them across ponds, dig them out of our gardens, and stare

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Explainer: What is a rock?

[Munroe, Randall] on . *FREE* shipping on qualifying offers. Thing Explainer: Complicated Stuff in Simple Words

Thing Explainer: Complicated Stuff in Simple Words