I wonder what the Wellcome Institute does with all the postcards. One of the best things about the place is the way they encourage visitors to draw, and have a permanent postcard display wall with an ever-changing display of doodles, minor artworks and crude cartoons, mind maps and slogans, all executed in the rather useless but definitely non-toxic crayons they provide for the purpose. Perhaps they keep every single card no matter how badly drawn or offensive. That would be an appropriately scientific approach. On the other hand, they are arty too, so perhaps they choose the best and recycle the rest. In that case I hope they kept this one.