Winter had gone on for 80,000 years when, in a very short period of time, an immense forest sprang up and covered the entire continent. A new planetary configuration brought about a transformation; the cycle of seasons became established, the landscape metamorphosed, and the flora and fauna evolved as the story unfolded. After traveling the world alongside migrating birds, and diving the oceans with whales, Jacques Perrin and Jacques Cluzaud take us on a trip back through time to rediscover the European landscape we have shared with wild animals since the last Ice Age.