Because of the Earth tilting on its axis and those catastrophic climate shifts, we had to figure out how to find better food, and we had to learn -- there's Lucy; that's how we all began -- we had to learn how to crack open animal bones, use tools to do that, to feed on the marrow, to grow our brains more.
地球の地軸の傾斜が変わったために 壊滅的な気候変動が起こり 我々の祖先はよりよい食物を見つけたり― 祖先のルーシーです― 道具を使って動物の骨を割ることを覚え 骨髄を食べたりして 脳を発達させたのです