In this timelapse of the night sky, you can see lightning storms (beginning and end), and one of my favorite night scenes – as we cross over Africa from west to east, it is very dimly lit until the snaking spectacle of light along the Nile appears (worth the wait), erupting into the brilliance of Cairo and the river delta. It’s a perfect illustration of the vitality of our planet’s water sources and how our human cultures have developed along them.