There's a solid consensus among scientists about what happened to the dinosaurs 66 million years ago: A mountain-sized meteorite crashed into the planet and triggered a mass extinction. The debris from the impact has been found in hundreds of locations around the world. Geologists have also found signs of the giant crater, centered around the tip of Yucatan Peninsula.
But there has long been an alternate theory, espoused by a rump caucus of researchers who think they’ve never been given a fair hearing. They believe the extinction was caused, at least in part, by an extraordinary volcanic eruption in India.