translation.en: It's because, well, thousands of years ago, people invented ideas -- they had ideas, innovations, technology -- and the Stone Age ended, not because we ran out of stones.
translation.zh: 而是因为 数千年前， 人们搞发明， 有想法，创新性，科技。 石器时代的结束 不是取决于人类用完了石头。