LUCA, the Last Universal Common Ancestor

We're experimenting and would love to hear from you! In this episode of Discover Daily, we explore LUCA, the Last Universal Common Ancestor. Scientists have dated this single-celled organism from which all modern life descends, to 4.2 billion years ago - just 400 million years after Earth's formation. This ancient organism possessed remarkable complexity, including 2,600 protein-coding genes, a sophisticated immune system with 19 CRISPR genes, and the ability to perform complex metabolic proc...

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