Understanding the Catastrophic Cause of Dinosaur Extinction

The most widely accepted theory is the K-T impact event, a massive asteroid collision that caused widespread environmental changes.

1. Impact created a cloud of dust, blocking sunlight and cooling the planet.
2. This led to mass extinctions due to starvation and climate change.

The K-T boundary layer in rocks worldwide contains iridium, an element common in asteroids but rare on Earth's surface, supporting this theory.

Pro tip: The asteroid impact theory was first proposed by Walter Alvarez and his father Luis in 1980, but it took decades of evidence to gain widespread acceptance.