The question Enceladus is asking is whether the transition from chemistry to biology is easy or hard. Whether it is something that happens whenever conditions permit, or whether we are alone in a universe that almost got there but never quite did.

A small, bright moon, five hundred kilometres wide, has become the most precise instrument humanity has ever had for answering that question. And it is answering it in real time, one grain of ice at a time.

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Timestamps:
0:00 Enceladus.
1:28 The Moon Herschel Couldn’t See.
4:46 Cassini and the Plumes.
8:18 The Chemistry Stack.
13:26 The 2025 Reveal: Fresh Organics and a Stable Ocean.
22:40 The Honest Complication.
27:24 What the Ice Grains Are Carrying.

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