Dodecahedron with Five Intersecting Tetrahedra
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Five Intersecting Tetrahedra arranged in rotational icosahedral symmetry make a Dodecahedron if you connect the points.
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Dodecahedron with Five Intersecting Tetrahedra
If you assemble five intersecting regular tetrahedra with even spacing (rotational icosahedral symmetry), you get a dodecahedron when you connect the points.
The original model had only the five tetrahedra, with point contact on the print bed. This model adds the outer Dodecahedral edges making for a stronger model and easier to get good bed adhesion. I had issues with the undersides of the outer edges with my support angle so I suggest making your support angle lower to make sure every underside is well supported.
Inspired by this video with Adam Savage and Matt Parker:
https://www.youtube.com/watch?v=s_F4uD8wAs0
More info on Wikipedia:
https://en.wikipedia.org/wiki/Compound_of_five_tetrahedra