Amazing Discovery! Gasoline Smells Like . . . .

duh

In this source, http://www.atsdr.cdc.gov/toxprofiles/tp72-c3.pdf, on p. 109, the CDC oh-so-helpfully describes the odor of gasoline as a “gasoline odor.” Yes, really. They even cite a source for this fact, as if it were ever questioned by anyone. I’m glad to see my tax dollars going to such ground-breaking research — aren’t you? Here’s a screenshot (I added the red ellipses):

gasoline smells like gasoline

Now I have a headache.

Slowly Rotating Hyperdodecahedron

This is the hyperdodecahedron, or 120-cell, one of the six four-dimensional analogs of the Platonic solids. It’s been shown on this blog before, but this image has one major change: a much slower rotational speed. It is my hope that this will help people, including myself, with the difficult task of understanding four-dimensional objects.

5-Hi, 120-cell, Hecatonicosachoron

This image was created using Stella 4d, a program you can try, as a free trial download, at this website.

A Law of Blogging, in Venn Diagram Form

venn diagram about blogging

Places I Have Been, #2: When Was I Last There?

This is a more detailed version of one of the earliest posts on this blog, “Places I Have Been.” In this version, I color-coded the states and provinces to show when I was last in each of these places (the color-coding is explained below the picture). Also, no, I haven’t left North America — yet — but visits to all the other continents on Earth, plus the Moon, are definitely on my lifetime “to do” list.

placesihavebeen-1

Here’s the color-key. It starts in the present, and then proceeds in reverse chronological order.

Red — I’m here right now. Arkansas is also the state where I have spent well over 90% of my life, and I was born here, as well, 47½ years ago (January, 1968).

Pink — These are states I’ve been to since turning 45, not counting where I am at the moment. It’s also the set of states my wife and I have visited together — so far.

Purple — I was last in each of these states during the first half of my forties.

Dark blue — I was last in Kansas in my thirties, flying there, with two other math teachers, for an educational conference.

Yellow — Louisiana is the only state which I last visited in my twenties.

Green — These are states I last visited at age nineteen. So far, that’s the furthest I have traveled in a single year. The green Mexican state on the map is Chihuahua, where I visited Cuidad Juárez, just across the Rio Grande from El Paso, Texas.

Light blue — These are the states and provinces I last visited as a “tween” (ages 10-12). The Northern vacation trip was with my family, and, so far, that’s the only time I’ve been to Canada. Virginia made the map when I won a trip to Washington, DC (too small to be seen above), as one of a busload of young newspaper carriers, for selling twenty newspaper subscriptions to Arkansas Gazette — one of America’s many “lost newspapers,” and one which I very much miss. Alabama and Florida are included because of a field trip, all the way to Key West, with a college class — one of the benefits of growing up as a “professor’s kid” who spent a lot of time on campus.

Brown — I have been to South Carolina once, but I wasn’t even close to ten years old at the time, and now I barely remember this family trip to the Atlantic coast.

Gray — I was so young, when my parents took me to Colorado, that I have no memories from that trip at all. I don’t think my younger sister had even been born yet, in fact. All I remember is being told, much later, that, yes, I have been to Colorado.

Riddle: How did the chemist accidentally kill his dog?

Answer: He fed him a whole can of aluminum phosphate.

Aluminum phosphate

Disclaimers: (1) no actual dogs were harmed in the making of this awful pun, and (2) yes, I actually did the math regarding the toxicity of aluminum phosphate. Don’t feed it to your dog!

Trinary Rhombicosidodecahedra

Faceted Augmented Rhombicosidodeca

This image of three rhombicosidodecahedra “orbiting” a common center was made with Stella 4d, a program you may try for free at this website.