What do animals mean to us? Naomi Alderman explores how animals shape human understanding, from ancient burial rites to modern science.

The psychologist Justin Gregg specialises in dolphin social cognition. He introduces his new book, Humanish, a witty and provocative look at anthropomorphism — our habit of seeing human traits in animals, objects and machines — and how it helps us make sense of the world and increases empathy.

Peter Fretwell is a leading scientist at the British Antarctic Survey, and author of The Penguin Book of Penguins. He celebrates the charm and complexity of penguins, from their evolutionary quirks to their cultural symbolism, alongside the threats they face today.

Marianne Hem Eriksen is Professor of Viking Studies at the National Museum of Denmark and part of the BBC / Arts and Humanities Research Council scheme of New Generation Thinkers. She draws on archaeological evidence to show how Viking societies had a complex relationship with animals, seeing them not just as pets or food, but as extensions of human identity and mythology.

Producer: Katy Hickman