I Didn't Want This To End

It's taken mankind what, 6,000 years or so to fully explore the land mass of planet earth? And then I look at this and realize that even if we had the capability to send humans to Mars, a dozen lifetimes wouldn't be enough to explore it all. We aren't even to baby steps yet; as a species we're still learning how to roll over and crawl in this amazing universe we find ourselves in.