On: CRISPR-like ‘immune’ system discovered in giant virus

[abecedarius]

https://en.wikipedia.org/wiki/Capsid doesn't seem to say which ones are d12's, but it's in the list! Pretty neat.

[dnautics → abecedarius]

the d12 ones are effectively equivalent to d20s because an icosahedron is the dual solid of the dodecahedron; depending on "how you look at it", T1 virus capsids can either be "d20s" or "d12s".