How do scientists clone animals?

By a process called somatic cell nuclear transfer.Scientists take a somatic cell from an adult animal and isolate the nucleus from that cell.They then take an egg from another one of the same animal and remove the nucleus from that egg, replacing it with the somatic cell nucleus. They then "fool" the egg into thinking it has been fertilised , and the egg divides and develops as any normal egg would.This fertilised egg is implanted into a fertile female , and it develops as normal.