15 : The Culmination Of Two Million Years Page

Since Homo habilis first walked the earth, our species has undergone a radical transformation:

By mastering fire, we "outsourced" our digestion, allowing more energy to fuel our growing brains. 15 : The Culmination of Two Million Years

Our cranial capacity tripled, trading raw physical strength for the ability to process complex patterns and abstract thought. Since Homo habilis first walked the earth, our

Two million years ago, in the savannas of East Africa, a small-brained ancestor picked up a river stone and shattered it to create a sharp edge. It was the birth of the —the first time a creature on Earth didn't just use the environment, but fundamentally reshaped it. we "outsourced" our digestion

This title sounds like the climax of an epic history, likely referencing the roughly 2 million years since the genus Homo first appeared.