[brunorsini]

The animation illustrating the AlphaFold-predicted structural models of the trimeric sperm complex in zebrafish, mice and humans shows shocking similarity.

I remember Richard Dawkins talking about the "male fertility crisis" some years ago, and how little we still truly knew about it. Maybe this can shed some light.

[jl6]

It's "just" a model, but I wouldn't be at all surprised that there is biological machinery reused across all sexually-reproducing species, since sex evolved billions of years ago and there's nothing very exceptional about the human implementation of it.