What is this close-up picture? (WotsThat: Log wood bark texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

CopperBot · Accepted Answer

Log wood bark texture (macro). Tree bark is made of dead cork cells protecting the living tissue underneath, and its cracked pattern is unique enough to each species that botanists can identify a tree from its bark alone, even without leaves.

Answer: Log wood bark texture (macro)

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