Message #2428

From: Roice Nelson <>
Subject: Re: [MC4D] Henry Segerman and the 30-cell puzzle
Date: Tue, 23 Oct 2012 09:56:04 -0500

I wanted to mention I follow Henry on Google+ and his YouTube
and have found both a great way to keep up with his new designs. His stuff
is just awesome!

Last year, I ordered his 8-cell and 16-cell shapeways models, and they are
lovely. Just a few weeks ago, I told Sarah I wanted this
my birthday. It has 3 full rings of dodecahedra from the 120-cell. I
especially like his focus on polytopes in S3, because of all the arcs you
get in the projections to R3, but he has a number of other neat themes in
his work as well.

I was lucky to get to meet Henry at G4G9 and again at G4GX. He has a
homepage at:

Thanks Nan for posting this to 4D_Cubing :)


On Sat, Oct 20, 2012 at 3:03 AM, schuma <> wrote:

> A couple of days ago I watched an awesome youtube video by Henry Segerman
> about the 30-cell puzzle designed by Saul Schleimer and Henry:
> Henry also announced it on the twistypuzzles forum:
> Usually an "n-cell" puzzle lives only in 4D, but this puzzle is 3D
> printed! It is based on the geometry of the 120-cell (projected into 3D).
> They picked 30 out of the 120 cells and made an assembly/disassembly
> puzzle. Please check the video or the pictures in the twistypuzzles page to
> see the details.
> As a result, (for the first time?) you can order a physical 4D puzzle from
> Shapeways:
> and play with your 3D hands. Henry also designed many 3D printed
> sculptures including several 4D regular polytopes.
> And he said he was working on more puzzles! I bet they are going to be
> great.
> Nan