The Great Oxygenation Crisis: Earth’s Most Catastrophic Mass Extinction Event
Journey back in time to the Great Oxygenation Event -- a mass extinction that most people have never even heard of. Early in Earth’s history, the planet experienced a steep rise in oxygen concentration, resulting in the death of almost every species living at the time. Expedition Leader Eleanor Edye takes us back 2.4–2.7 billion years ago to discover what the world was like before life as we know it, to a time that determined the path of every species to come afterward (including us!).
Originally presented February 29, 2024
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