A small but valuable change to the procedure for rolling-circle amplification creates a useful cell-free cloning method. The authors were familiar with this polymerase because of their previous ...

In this slide show showing somatic cell nuclear transfer, as it's also known, we explain how we clone egg cells to create embryonic stem cells in our lab at Children's Hospital Boston. Unless ...

It was the first time scientists had been able to clone a mammal from an adult cell, taken from the udder. Science Photo Library Dolly the sheep was the first mammal to be cloned 20 years ago ...