The Ancient Blueprint in Vents and CellsHow biology copied a trick from geology.

From the show

Nature's Hidden Blueprint

A key metabolic process suggests life didn't invent its core chemistry, but adopted it from the planet. Deep in the ocean, hydrothermal vents use metals to turn CO2 into organic molecules—the same reaction used by some of Earth's most ancient microbes. This shared mechanism hints that biology's first spark was learning to optimize a reaction the Earth was already performing, offering a powerful clue to how life could begin.