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Our transcription: It's sobering, and at the same time exhilarating, to stare into the abyss of geologic time and realize that it all began with tiny and extremely simple organisms. Organisms like these gave rise to the vast variety of life on Earth. The resilience of life is truly amazing when we consider the many mass extinctions that have occurred throughout Earth history. The latest mass extinction may be taking place at this very moment. The impact of humans on Earth is causing species of both plants and animals to disappear at an astounding rate. Many scientists estimate that a larger percentage of the Earth's species will disappear within our lifetime than were lost during the mass extinction of the dinosaurs.
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