1: The Basics of Life 1: How life works 2: How reproduction works 3: How cells work 4: How DNA works 5: How evolution works 6: How classification works

2: Microorganisms and Fungi 1: How microorganisms work 2: Types of single-celled life 3: How germs work 4: How algae work 5: Marine algae 6: How mushrooms work 7: Types of mushrooms 8: How mould works 9: How lichen works

3: Plants 1: How plants work 2: How flowering plants grow 3: How seeds grow 4: How roots and stems work 5: How trees work 6: How leaves work 7: How flowers work 8: Types of flowers 9: How fruits grow 10: How seeds travel 11: Deciduous forests 12: How plant defences work 13: How carnivorous plants work 14: How desert plants survive 15: How aquatic plants work

4: Invertebrates 1: How invertebrates work 2: How snails work 3: How bivalves work 4: Types of shells 5: How octopuses work 6: How sea anemones work 7: How corals work 8: Coral community 9: How jellyfish work 10: How starfish work 11: How worms work 12: How sea worms work 13: How insects work 14: Types of insects 15: How exoskeletons work 16: How metamorphosis works 17: How insects see 18: How antennae work 19: How insects hear 20: How wings work 21: How a mantis hunts 22: How parasites work 23: How chemical defences work 24: How stingers work 25: How camouflage works 26: How mimicry works 27: How bees work 28: How ants work 29: Fireflflies 30: How spiders work 31: How spider silk works 32: How scorpions hunt 33: How millipedes work 34: How crabs work

5: Fish 1: How fish work 2: How fish swim 3: How fish senses work 4: How fish reproduce 5: How fish care for their young 6: Salmon migration 7: How sharks work 8: How fish defences work 9: How camouflage works 10: Fish school 11: How symbiosis works 12: How deep-sea fish work

6: Amphibians 1: How amphibians work 2: How tadpoles grow 3: Frogspawn 4: How frogs move 5: How frogs communicate 6: How defence works 7: How salamanders work 8: How axolotls work

7: Reptiles 1: How reptiles work 2: How scales work 3: How snake senses work 4: How reptile eggs work 5: Marine iguanas 6: How crocodiles hunt 7: How chameleons hunt 8: How chameleons change colour 9: How geckos climb 10: How tuataras work 11: How snakes move 12: How snakes kill 13: How snakes eat 14: How tortoises work

8: Birds 1: How birds work 2: How bird skeletons work 3: Types of beaks 4: How birds fly 5: How wings work 6: How feathers work 7: How hummingbirds hover 8: Life on the move 9: How birds migrate 10: How courtship works 11: How nests work 12: How eggs develop 13: How birds grow 14: How cuckoos work 15: How owls sense prey 16: How eagles hunt 17: Types of bird feet 18: How ducks swim 19: How birds dive 20: How penguins move 21: Surviving the storm 22: How ostriches work

9: Mammals 1: How mammals work 2: How hair works 3: How mammal senses work 4: How mammals are born 5: How mammals feed their young 6: How mammals care for their young 7: How mammals grow up 8: How hierarchy works 9: How pack hunting works 10: Ocean giants 11: How conflict works 12: How defence works 13: How carnivores work 14: How insect eaters work 15: How herbivores work 16: How rodents work 17: How beavers live 18: Types of mammal limbs 19: How bats work 20: Ceiling sleepers 21: How mammals glide 22: How gibbons swing 23: How mammals burrow 24: How elephants work 25: Land giants 26: How whales work

10: Habitats 1: How biomes work 2: How tropical rainforests work 3: How temperate forests work 4: How boreal forest works 5: How tropical grasslands work 6: How temperate grasslands work 7: How wetlands work 8: How mountains work 9: How deserts work 10: How tundras work 11: How polar regions work 12: How rivers and lakes work 13: How oceans work

11: Glossary 12: Index 13: Acknowledgments