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1952 First animal cloning: Robert Briggs and Thomas J. King cloned northern leopard frogs.
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1962 Biologist John Gurdon announced that he had cloned South African frogs using the nucleus of fully differentiated adult intestinal cells. This demonstrated that cells' genetic potential do not diminish as the cell became specialized.
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1984 Steen Willadsen cloned a sheep from embryo cells, the first verified example of mammal cloning using the process of nuclear transfer.
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1986 Using differentiated, one week old embryo cells, Steen Willadsen cloned a cow.
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1993 Human embryos were first cloned.
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July 1995 Ian Wilmut and Keith Campbell used differentiated embryo cells to clone two sheep, named Megan and Morag.
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July 5, 1996 Dolly, the first organism ever to be cloned from adult cells, was born.
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July 1997 Ian Wilmut and Keith Campbell, the scientists who created Dolly, also created Polly, a Poll Dorset lamb cloned from skin cells grown in a lab and genetically altered to contain a human gene.
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August 1997 President Clinton proposed legislation to ban the cloning of humans for at least 5 years.
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1999 Tetra the cloned monkey is brought to life.
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A rare wild Asian ox named noah was cloned but died two days later from scours.
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Snuppy (Seoul National University puppy): the first cloned dog
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Snuppy has become a father after the world's first sucessful breeding involving only cloned canines (Seoul National University).
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the first cloned camel (Injaz) was born at Dubai's Camel Reproduction Center
