4 minutes and 17 seconds of astounding education. And humility

We are tiny, folks. Our problems? Think about it. I hope people would slow down, see this and listen to the full narration of this video. What he relates is overwhelming. We can't even begin to contemplate all he tells. The distances, the times, the quantities. If need be, rerun it. Dude. I'm in awe, for sure. But then it makes me feel like this: