I’m Walking on an Active Volcano at Yellowstone National Park

At the time my wife took this picture, I did not yet realize that we were walking around on an active volcano when we recently visited Yellowstone National Park. The outgassing behind me, which I had just walked through, should have clued me in, since it had a strong smell of hydrogen sulfide mixed with hydrochloric and sulfuric acids. At a gift shop, I found a book by Greg Briening called Super Volcano: The Ticking Time Bomb Beneath Yellowstone National Park. It explains the science of Yellowstone, and makes a strong case that the volcano that created Yellowstone will blow up again, possibly soon, with cataclysmic consequences worldwide.

Pictures of Delicate Arch, from Arches National Park

These pictures all include Delicate Arch, which I once painted, before first seeing it for real a few days ago. It’s the sandstone formation on the left.

We visited Arches N.P., in Utah, on our way to Yellowstone National Park. More vacation pictures are coming soon.

Places I Have Been, #3 (Updated for Yellowstone Trip)

My wife Dee and I live in Arkansas, the state shown in yellow above. This map shows, in pink, states we have visited together, between 2013 and the present. I just updated it for our vacation to Yellowstone National Park, which roughly doubled the pink area. States and provinces shown in blue are ones I have visited, but not with Dee, all before 2013. It is my ambition to visit other continents as well — it just hasn’t happened yet.

We took a lot of pictures on our trip, and they’ll show up here soon. First, though, I need sleep, for that was quite a long drive!

A Rhombic Enneacontahedron, Made of Zome

Zome is a ball-and-stick modeling system which can be used to make millions of different polyhedra. If you’d like to get some Zome for yourself, just visit http://www.zometool.com.

A Symmetrohedron Featuring Regular Octagons, Pentagons, and Triangles

The only irregular faces in this polyhedron are the quadrilaterals (kites and rectangles). I made it using Stella 4d, which you can try for yourself — for free — at http://www.software3d.com/Stella.php.

A Zonohedron Which Is Also a Symmetrohedron

I made this using Stella 4d, which you can try for free at http://www.software3d.com/Stella.php.

This zonohedron is based on the icosidodecahedron / rhombic triacontahedron compound — more specifically, on its edges. Twelve faces are regular decagons, twenty are regular hexagons, sixty are squares, and the only irregular faces are the thirty equilateral octagons. That’s 122 faces in all.