What would you like to see more of? Let us know!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 processes...