When you shake an electron, it spits out electromagnetic radiation. This fact is the basis of all wireless communication, from radio to wifi to satellite navigation. But despite these engineering applications, the behavior of moving charges is critical to pure theoretical physics. Einstein's 1905 paper "On the Electrodynamics of Moving Bodies," among the most important papers ever published, showed that the way a charge radiates contains the seeds of a remarkable new subject called special relativity. Come to this class to hear how the study of moving charges led to an idea which revolutionized our understanding of what space and time really are.