The Animal Kingdom

100 chapters. 10 topics. Every branch of animal life.

Contents

🧬01–10

01. What Is an Animal?

The cell, the tree of life, and where animals begin.

🐛11–20

02. The Boneless Majority

Sponges to insects — 97% of all animals have no backbone.

🦴21–30

03. The Backboned

Fish, amphibians, reptiles, birds, mammals — and us.

❤️31–40

04. Bodies & Blueprints

Skeletons, hearts, lungs and the engineering of an animal.

👁️41–50

05. The Senses

Eyes, ears, sonar, electricity — many ways to know the world.

🏃51–60

06. On the Move

Swimming, flying, running, burrowing and everything between.

🦁61–70

07. Feeding & the Food Web

Hunters, grazers, filterers and the web that links them.

🥚71–80

08. Life Cycles

Eggs, metamorphosis, parenthood and the point of it all.

🧠81–90

09. Minds & Behaviour

Intelligence, communication, migration and animal culture.

🌍91–100

10. Animals & the Future

Habitats, extinction, discovery and the shape of what's next.

Curated by KnowledgAI · 2026 · A CleverFox encyclopaedia