this post was submitted on 03 Jan 2026
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What is this thing?

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Let us help you identify that mysterious object you’ve found.

Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.

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It makes a "clink" when tapping it on glass or metal. Or with a finger nail. Found on a river bed in Wisconsin.

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[–] heyWhatsay@slrpnk.net 11 points 1 week ago

I don't see tree rings, and the shape looks correct for a split bone missing the marrow.