The authenticity of two cloned wolves, introduced to the world as the first of their kind last month, has been questioned. 

The science journal Cloning & Stem Cells, has withdrawn a paper on wolf cloning while an investigation into incorrect data is underway.
Apparenlty the authors have requested corrections, and the Seoul National University (SNU) is also conducting an investigation.
On March 26, a team from South Korean scientists from SNU announced they had successfully cloned to wolves, but questions have been asked about the research after incorrect details were found in a table analysing the mitochondial DNA sequence of the wolves and their surrogate mother dogs.
A university panel has launched in investigation into the research and has asked outside experts to verify samples.