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History of cloning

Cloning Fast Facts

CNN News Wire | 8/6/2014, 4:08 p.m.
Here's some background information about cloning, a process of creating an identical copy of an original.

August 3, 2005 - South Korean researchers announce they have successfully cloned a dog, an Afghan hound named Snuppy.

December 8, 2008-April 4, 2009 - Five cloned puppies from Trakr, a German Shepherd Sept 11 Ground Zero rescue dog, are born.

May 2009 - Clone of Tailor Fit, a two-time quarter horse world champion, is born, one of several cloned horses born that year.

September 29, 2011 - At South Korea's Incheon Airport, seven "super clone" sniffer-dogs are dispatched in the war against contraband luggage. They are all golden Labrador Retrievers that are genetically identical to "Chase", who was the top drug detention canine until he retired in 2007.

May 15, 2013 - Oregon Health & Science University researchers report in the journal Cell that they have created embryonic stem cells through cloning. Shoukhrat Mitalipov and the biologists produced human embryos using skin cells, and then used the embryos to produce stem cell lines.

April 2014 - For the first time, cloning technologies have been used to generate stem cells that are genetically matched to adult patients. Researchers published this month put the nucleus of an adult skin cell inside an egg, and that reconstructed egg went through the initial stages of embryonic development.