Ears; Eyes

Elephants' ears are wonderful things - their size and flexibility lets them hear their special low-frequency language, regulate their body temperature, signal their moods and pinpoint the direction of any sound. Owls have ears which guide them to their prey in total darkness and tarantulas hear through hairs on their legs. These are just a few examples of what Ears is all about - the adaptation of sense organs to life-style and environment.

The same goes for Eyes which is particularly good on the differential advantages of binocular (for hunters) and monocular (for hunted) vision. Did you know that scallops have eyes but sea anemones don't? This is because scallops need to escape from starfish while anemones are happy to stand and slug it out with them; the author should know - he set up the Education Department at Brighton Aquarium.

There's a spare but explicit text in these two -making the most of the copious illustrations.