Book excerpt: Join QI's expedition into the animal kingdom to encounter 100 of its most remarkable subjects. Marvel at the elephants that walk on tiptoe, pigs that shine in the dark, and the woodlouse that drinks through its bottom. Albatrosses can fly non-stop for ten years without touching the ground. Box jellyfish have twenty-four eyes. Geese mourn their dead. Koalas don't drink. Monkeys pay to look at porn. Lobsters live for a century. Mice sing while having sex. Spiders can fly.