Time is one of the hardest concepts to wrap your head around. People have been on the earth for about 300,000 years. For almost all of that time, we've been hunter-gatherers. But how long has the Earth been here? NPR's Skunk Bear does a great job of helping us visualize Earth's history and our place in it. The video is below and the original post is here. https://www.youtube.com/watch?v=M8V_glRW1hA&feature=youtu.be
