When the Earth Was Green Audiobook By Riley Black cover art

When the Earth Was Green

Plants, Animals, and Evolution's Greatest Romance

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When the Earth Was Green

By: Riley Black
Narrated by: Wren Mack
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About this listen

A gorgeously composed look at the longstanding relationship between prehistoric plants and life on Earth

Fossils plants allow us to touch the lost worlds from billions of years of evolutionary backstory. Each petrified leaf and root show us that dinosaurs, saber-toothed cats, and even humans would not exist without the evolutionary efforts of their leafy counterparts. It has been the constant growth of plants that have allowed so many of our favorite, fascinating prehistoric creatures to evolve, oxygenating the atmosphere, coaxing animals onto land, and forming the forests that shaped our ancestors’ anatomy. It is impossible to understand our history without them. Or, our future.

Using the same scientifically-informed narrative technique that audiences loved in the award-winning The Last Days of the Dinosaurs, in When the Earth Was Green, Riley Black brings listeners back in time to prehistoric seas, swamps, forests, and savannas where critical moments in plant evolution unfolded. Each chapter stars plants and animals alike, underscoring how the interactions between species have helped shape the world we call home. As the chapters move upwards in time, Black guides listeners along the burgeoning trunk of the Tree of Life, stopping to appreciate branches of an evolutionary story that links the world we know with one we can only just perceive now through the silent stone, from ancient roots to the present.

©2025 Riley Black (P)2025 Macmillan Audio
Animals Botany & Plants Evolution Paleontology
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Critic reviews

Winner, A Friend of Darwin Award, 2024

"Black’s creative writing style and vivid descriptions, paired with well-chosen scientific facts, transport readers to verdant, sometimes violent scenes from our planet’s past." Booklist

"BLACK IS A POET OF PREHISTORY, narrating the final moments of a gooey mosquito or the accidental, tree-bound voyage of a monkey with the detail of someone who was there and saw it all, millions of years ago.... This is a book steeped with vegetal beauty, one that unfurls like a flower, blooming." —Sabrina Imbler, author of How Far the Light Reaches and staff writer at Defector

BRILLIANT, BRIMMING WITH INSIGHT, and boundlessly entertaining. Black launches a grand tour of deep time, surveying the influence of plant life on animal evolution (and vice versa). It’s a 1.2 billion-year fandango, masterfully chronicled.” —Jason Roberts, author of Every Living Thing and A Sense of the World

AN ESSENTIAL, EXTRAORDINARY STORY...Black shows us how the natural world has always been a splendid, entangled scrum of interactions and transactions." —Daniel Lewis, author of Twelve Trees, Dibner Senior Curator for the History of Science and Technology, Huntington Library

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