We’re back and we’ve got some questions. Evolution has shaped us into the odd-looking, brilliant creatures we are, but how exactly did it do it? Why did our genetics settle on five fingers? And why do scientists have a perfect explanation for testicles but are completely stumped by our pointy chins?

This week, Emma Kennedy is joined by Dr. Max Telford, Professor of Zoology and Comparative Anatomy at University College London and author of The Tree of Life: Solving Science's Greatest Puzzle, to help us wrap our heads around the wonderful world of evolution. Buy The Tree of Life: Solving Science's Greatest Puzzle through our affiliate bookshop and you’ll help fund The Bunker by earning us a small commission for every sale. Bookshop.org’s fees help support independent bookshops too.

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WHY? is presented by Emma Kennedy. Produced by Liam Tait and Kathleen Johnston. Edited by Robin Leeburn. Theme music by Jade Bailey. Managing editor: Jacob Jarvis. Group editor: Andrew Harrison. Artwork by James Parrett. Additional music is from Artlist.io. WHY? is a Podmasters Production.

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