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Today in History: Dolly the Sheep: First Mammal Cloned from Adult Cell

2/22/2026

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Summary

Story summary

On February 22, 1997, scientists at the Roslin Institute in Scotland announced the successful cloning of Dolly, a female Finn-Dorset sheep. She became the first mammal cloned from an adult somatic cell, demonstrating that mature cells could produce a cloned organism. This breakthrough advanced the field of biotechnology and cloning research.

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Story summary

On February 22, 1997, scientists at the Roslin Institute in Scotland announced the successful cloning of Dolly, a female Finn-Dorset sheep. She became the first mammal cloned from an adult somatic cell, demonstrating that mature cells could produce a cloned organism. This breakthrough advanced the field of biotechnology and cloning research.