As humans accelerate global warming while laying waste to the environment, animals and plants must flee to the margins: on scattered nature reserves, between major highways, or among urban sprawl. And when even these places become too hot and inhospitable, wildlife is left with only one path to survival: an often-formidable journey toward the poles as they race to find a new home in a warming world.Tropical zones lose their inhabitants, beavers settle in Alaska, and gigantic shoals of fish disappear—just to reappear along foreign coastlines. Award-winning environmental journalist Benjamin von Brackel traces these awe-inspiring journeys and celebrates the remarkable resilience of species around the world.But the lengths these plants and animals must go to avoid extinction are as alarming as they are inspirational: Sea animals—like fish—move on average 45 miles a decade to cooler regions, while land animals—like beavers and butterflies—move 11 miles.As even the poles of the Earth heat up, we’re left with a stark and irreversible choice: Halt the climate emergency now, or face a massive die-off of species, who are increasingly left with nowhere else to go.