When was the first mammal successfully cloned?

The first mammal successfully cloned was a sheep named Dolly, and this groundbreaking achievement occurred in 1996. Dolly was cloned by scientists at the Roslin Institute in Scotland using a technique called somatic cell nuclear transfer. This process involved taking a nucleus from an adult sheep's udder cell and placing it into an unfertilized egg that had its nucleus removed. This developed into an embryo, which was then implanted into a surrogate mother and successfully resulted in the birth of Dolly. The cloning of Dolly paved the way for further advancements in cloning technology and opened up new possibilities for scientific research and medical advancements.