If most of us hear the word ‘egg’ it’s likely our minds will immediately turn to the hens’ eggs that we enjoy fried, poached or scrambled for our breakfast.

But on closer inspection it turns out that the natural world is filled with all manner of different kinds of eggs that are as varied and fascinating as the animals that produce them. And what’s more, eggs have helped to shape life on Earth as much as life has shaped them.

In this episode I speak to zoologist and award-winning science writer Jules Howard about his new book Infinite Life: A Revolutionary Story of Eggs, Evolution and Life on Earth.

He tells us about the fascinating evolution of eggs over hundreds of millions of years, the strange and varied forms they’ve taken over all of this time, and how the story all began with jellyfish.

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