Jess French is a passionate vet, zoologist and naturalist who has been named one of Britain's top 50 conservationists by BBC Wildlife magazine. She presented her own TV series on CBeebies called Minibeast Adventure with Jess and worked on Live 'n' Deadly (CBBC), Deadly Mission Madagascar (CBBC), Springwatch (BBC) and Micro Monsters 3D (Sky). Jess has written several books for children for many publishers.

• 4: Lost But Not Forgotten
• 6: World Map of Extinct Species
• 8: Velociraptor and Protoceratops
• 10: Woolly mammoth
• 12: Chinese river dolphin
• 14: Formosan clouded leopard
• 16: Kunbarrasaurus
• 18: Giant moa
• 20: Thylacine and gastric brooding frog
• 22: Spinosaurus
• 24: Malagasy dwarf hippopotamus, koala lemur and giant aye-aye
• 26: Dodo
• 28: Atlas bear
• 30: Megalodon
• 32: Cameroceras and Giant sea scorpion
• 34: Steller's sea cow
• 36: Patagotitan
• 38: Glyptodon and Megatherium
• 40: Pinta Island tortoise
• 42: Quetzalcoatlus
• 44: Dire wolf and sabre-toothed cat
• 46: Passenger pigeon and Carolina parakeet
• 48: Jamaica giant galliwasp and Jamaican racer
• 50: Meganeura
• 52: Cave hyena
• 54: Great auk
• 56: Pyrenean ibex and aurochs
• 58: Lazarus species
• 60: Mass extinction events
• 62: Extinction timeline