Based on information and a quote by anyletter (who needs to contact me via his reddit account if (s)he still wants a free copy!)
Buy on etsy
Hydrogen t-shirts are now available from Threadme for anyone who wants one (they can deliver worldwide).
How I work
I keep getting asked how I work, so I thought I'd post up some rough work here too. Unusually I knew exactly how I was going to illustrate this quote the second I read it. Usually though, I begin with a page or three of thumbnail sketches.
Also, thank god I got rid of the bunches.
some bacteria body types on google images, and doodled them for an hour or so, pen straight to paper (they were so quick to draw I wasn't worried about making mistakes).
Next I scanned the sketches. I used live trace in illustrator to vectorise the bacteria, and added colour. I then used a tablet to draw over the figure, fixing the shape as I went.
With those steps done I composed the final image. I then imported this into Photoshop, and added a little noise. Job done!