Everything Everywhere Daily: History, Science, Geography, & More · Gary Arndt

The Chicxulub Impact

March 19, 2026·17 min·1 clip

The Alvarez team found iridium in a thin clay layer, suggesting a massive asteroid impact wiped out the dinosaurs.

This episode explores the Chicxulub impact, the asteroid strike 66 million years ago that caused the mass extinction of dinosaurs. It details the decades-long scientific journey to discover and confirm the crater, from the initial iridium anomaly finding by the Alvarez team to the eventual identification of the buried structure in Mexico's Yucatan Peninsula. The narrative highlights the clash between gradualism and catastrophism in geology, culminating in how this event reshaped life on Earth.

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