A Ton of Space Junk Tumbles Unpredictably to Earth Every Week

One December afternoon, the sky tore open and a fiery hunk of metal, wider than a school bus, came hurtling down. It was louder than a thunderclap when it plunged into a patch of farmland, startling everyone in the village of Mukuku, about three hours south of Nairobi, Kenya. “People were thinking this is the end of the world,” said John Mukunuu, who lives nearby. When the villagers arrived, they found a giant ring, taller than a man and heavier than a horse, lodged into the earth. They watched it…