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Comets probably didn’t seed life on Earth after all, new study suggests, challenging century-old idea | Researchers at Cambridge found the cometary delivery of these building blocks of life would be – at best – a ‘one-off fluke’, and not the steady rain of prebiotic molecules that had been theorised


. The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry many of these molecules.

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