90% are unknown still but the species which have been studied have given us penicillin, ways of breaking down plastics, food and bio fuels but they can also be dangerous. Neither animal nor vegetable, they are both amongst us and within us, shaping our lives in ways it is difficult to imagine. Merlin Sheldrake's book about fungi, Entangled Life, has won the Royal Society Science book of the year and the Wainwright Conservation prize so here's Matthew Sweet with him and others discussing the amazing life of mushrooms.

Francesca Gavin curated an exhibition Mushrooms: The Art, Design and Future of the Fungi, which ran at Somerset House in London and is now available to view as an online tour. It features the work of 40 artists, musicians and designers from Cy Twombly to Beatrix Potter, John Cage to Hannah Collins.

Sam Gandy is an ecologist, writer and researcher who has collaborated with the Centre for Psychedelic Research at Imperial College. https://www.imperial.ac.uk/psychedelic-research-centre/

Begoña Aguirre-Hudson is Curator and Mycologist at Royal Botanic Gardens, Kew. She helps look after the Kew Fungarium - the largest collection of fungi in the world.

Producer: Alex Mansfield

Cows, farming and our view of nature https://www.bbc.co.uk/programmes/m000n0g8

Humans, animals, ecologies: conversations with Anna Tsing and Joanna Bourke https://www.bbc.co.uk/programmes/m000sjmj