Did Comets Bring Earth’s Oceans? What D/H Ratios Reveal | Earth History For Sleep

What if the water in your body is older than Earth itself? Tonight we follow comets and oceans, comets and oceans, through the quiet math of D/H ratios—deuterium to hydrogen—asking whether Earth’s oceans were delivered from the dark. A soothing History for Sleep for deep thinking: existence, consciousness, and the unsettling idea that we may be made of distant ice and ancient starlight.

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