I needed an image to show the whole universe: the whole of time and space, with a positive and personal angle: most universe pics are so dark. I ended up making it myself, based largely on the NASA WMAP image via Wikimedia. The background is a cosmic web simulation from Johan Hidding. I chose it because a black background seems to miss the point: the universe is not empty and black, but full of interesting colorful things. The cosmic web (the large scale structure of galaxies) could just as easily be neurons, or super-strings, or quantum froth, or lots of other interesting stuff. The universe is an interesting place.