There are over 131 million pieces of debris currently whipping around the planet. They range in size from a grain of sand to the size of an entire bus. These orbital debris pose a serious threat to the thousands of satellites that underpin Earth’s vital technologies. So, how can we save our satellites and ourselves from all this trash? Jim Bentley and Imogen Ellen Napper investigate. Lesson by Jim Bentley and Imogen Ellen Napper, directed by Franz Palomares.