When I first saw it many years ago, it was astonishingly effective exhibit, with the title on the wall "Earth 400 million years ago".
Pity that this zoo closed, it had so many one-of-a-kind exhibits. Even exhibits which were later copied in other zoos, like rat sewer, naked mole rats or South American aviary were much better done than their later imitations. And significantly, they were better not simply because they were more expensive.
I hope these exhibits will not be forgotten, they were milestones in development of nature education.
