Everything we've done, from the moment we stumbled out of our caves and began to dress ourselves in fur, all the way through the Ice Age, the Dark Ages, the Roman Empire and two World Wars, right through to the present day with our smart phones and high-speed internet, has been but the blink of an eye in terms of the age of life on Earth.
Although it's impossible to date the age of the Earth precisely, geologists agree that life began on our home planet somewhere between 3.5 and 3.8 billion years ago, and of that time, humans have only existed for somewhere between 5 and 7 million years. That's somewhere between 0.13 and 0.2% of Earth's life-bearing history. Ever wondered why aliens haven't visited yet? Maybe they came by this planet millions of years ago and found nobody home.