Rolling hearts...

...and a lot more, on the unique Mathbus. Mentioning the heart was my sneaky try at making this a Valentine's Day blog entry.

Here's the left side, which is more fun than others (as always, you can click for a larger view):

I found photos of the first painting work (but not the last!) on the Physics Factory blog. I also read that the bus is powered by recycled eegee's french fry oil, provided by Grecycle.

I took these photos on June 12th.