I've seen quite a bit of science embroidery recently, particularly the project Edinburgh University ran to recreate drawings by "Spanish neuroscientist and pathologist Santiago Ramón y Cajal [...] famous for his beautiful, detailed, and accurate, illustrations of the histology of the central nervous system." This piece of embroidery I made is nowhere near as detailed or intricate, but it's still fairly accurate and I felt the French knots worked well to recreate the original. I did modify the colours a little. It has a 4" frame. Below is the original, which came from Wikipedia. I've had to rotate it slightly to match the way the embroidery version is shown in its frame.