These inventions had the biggest impact on humanity

In prehistoric times, human beings lived in dark, chilly caves completely lacking in Wi-Fi. Now, just a few millennia later, we can reach into our pockets and call up a good chunk of our species’ accumulated knowledge (along with a lot of cat photos). How did we go from worshipping the moon to walking on it? Much of human progress is the direct result of the history-making inventions that follow.