Thanks to the work of scientists, people will know exactly what time to expect the eclipse (see Mattox's previous post). In less entertaining but more important ways, we respond to scientific predictions all the time, even though we have no independent capacity to verify the calculations. We tend to trust scientists.
For years now, atmospheric scientists have been handing us a set of predictions about the likely consequences of our emissions of industrial gases. These forecasts are critically important, because this group of experts sees grave risks to our civilization. And yet, when it comes to reacting to the warnings of climate science, we have done little.Indeed! Wake up folks. Climate change is a real threat, and we must take action very soon.