Livet et al. 2007. Transgenic strategies for combinatorial expression of fluorescent proteins in the nervous system. Nature.
No, that’s not a winter scarf knitted from rainbow yarn. It’s a glowing mouse brain – the Brainbow paper is finally out! I was going to write this up, but the heck with it – just go read what Shelly wrote at Retrospectacle. She’s succinctly covered all the important points, with a nice science/art tie-in to boot.