3 集
第 1 集。First Invasion of Land
第 1 集。First Invasion of Land
How did life first begin on the planet and why did it move from the water to the land?
第 2 集。Rise of the Mammals
第 2 集。Rise of the Mammals
Why did mammals, including human beings, grow to dominate life on the planet?
第 3 集。Victors of the Dry Land
第 3 集。Victors of the Dry Land
The backbone was crucial to evolution, leading to fish, amphibians, reptiles, and birds.