Extinction Layer: The Cosmic Dust That Rewrote History

In the late 1970s, a geologist investigating a thin band of clay in Italy noticed something impossible: it contained astronomical levels of a rare, silvery-white metal. Iridium, scarcely found on Earth's crust, was suddenly the smoking gun for a planetary apocalypse. The scientific establishment scoffed at the idea that a single rock from space could annihilate the dinosaurs. This narrative plun...