You know humans are a blip in the lifespan of this planet.
If you've never 100% grasped how long it took life to evolve from lifelessness to something microscopic and then life as we know it, this is the clip for you. In fact, I'm pretty sure even if you are qualified or just knowledgeable in this area it will still be an eye opener.
This 60 second video, by Claire L. Evans, really brings home Earth's time scale and the gradual evolution of life. It's makes you see how quickly life evolved - an evolution explosion - how recent that is and quite significantly how new we are as life forms. Cool stuff.