Chapter 3 of 69 · 53 words · ~1 min read

CHAPTER VII

. THE AGE OF MAMMALS

§ 1. A new age of life 51

§ 2. Tradition comes into the world 52

§ 3. An age of brain growth 56

§ 4. The world grows hard again 57

§ 5. Chronology of the Ice Age 59

## BOOK II

THE MAKING OF MEN

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