Dinosaurs ruled the Earth for about 160 million years. Then they disappeared.
Scientists have argued for years about what killed off the dinosaurs.
Was it the huge volcanic eruption 66 million years ago in what is now India? That explosion changed the Earth’s climate in a major way. Then, just 150,000 years later, a meteorite from space struck the coast of Mexico. This also caused changes to the climate.
Both catastrophic events happened during what is called the Cretaceous Period in Earth’s history.
Scientists have long debated which event caused the dinosaurs to disappear? One reason the debate continued was the failure of the scientists to find a perfect window from which to look into the past.