I could've sworn I'd seen a picture of teeth in a petri dish well before the pandemic.

Sonething about needing to take a suitable stem cell biopsy during a wisdom tooth removal, and the challenge back then being no control over which tooth would form.

Am I just remembering a dream or an April fool's joke?

(Both have happened. IIRC it was someone on this forum who disabused me of the Medieval Mandelbrot).