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At the International Center for Lightning Research and Testing in Florida, Dwyer and colleagues use rockets to lure down lightning bolts, the better to study them. But interestingly—and I didn't know this—it turns out that what makes lightning is also still a mystery. Here's correspondent Chad Cohen (Florida Institute of Technology): Lightning is very difficult to study, and I think we probably understand better how a star explodes halfway across the galaxy than how lightning propagates from six miles up. And after hundreds of years of scientific scrutiny, we still do not understand the essential secret of how it begins inside a storm. They launch rockets with really long wires attached to try to create that express lane to ground that lightning likes so much.