I'm a big fan of XKCD in general, but today's comic is incredible: it's an animated gif showing the frequency of different events: births, deaths, earthquakes, someone in Phoenix putting on a condom, a star rotates 1000 times. It's totally enthralling. The more you watch it, the more you get a sense of how big the world, and the universe, really is. Go check it out if you haven't already.