35 thoughts on “Friday mystery object #389

  1. I thought patella too. But the bone perforations’ size suggested it’d be maximum mammal size, and the kneecaps of huge mammals aren’t particularly sesamoid.
    I thought it might be an extinct patella, but the colour is from whale grease.

  2. What is the size of this? I mean – I did run a tractor with a seat this shape… but if it’s only an inch, I wouldn’t be able to use it.

  3. I definitively am crawling around in circles. Supraoccipital of a blue whale skull? I’m just about at the end here.

  4. WELL! I certainly didn’t have the right whale… and kept jumping around on this one. The size was the issue at first. I should have stayed with the tractor seat guess!

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