SMRTR Science & EngineeringFeb 15, 2026Ars Technica

Tiny, 45 base long RNA can make copies of itself

SMRTR summary

Scientists discovered a tiny 45-base RNA molecule called QT-45 that can make copies of itself, representing a major breakthrough in understanding how life began on Earth. This self-replicating RNA, though slow and error-prone, demonstrates how early life could have emerged without proteins, using only RNA for both genetic storage and catalytic functions.

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