There is a great diversity amongst the arthropods, in size, shape, habitat and behaviour, but they are similar in two respects: skeletons on the outside of the body, and jointed limbs. Ladybirds and Lobsters, Scorpions and Centipedes: Introducing the Arthropods reviews the diversity and versatility of the Arthropods, and how they are adapted to survive in some of the harshest environments on earth.