Cloning isn't new. Nature's been doing it for billions of years with plants.
Things like potatoes and grass send out shoots which can grow into a whole new plant.
If you grow a plant from a cutting it's a type of cloning.
And identical twins are naturally-occurring clones of each other even though they're genetically different from their parents.
It doesn't have to be a whole human being which is cloned.
Scientists could copy our cells and fix genes that cause diseases.
Or new organs like skin or hearts could be grown to help people who are ill.
Opponents of cloning say cloning humans is very wrong because it goes against nature.
Most cloned animals die before they are born.
Cloned people may be discriminated against.
An army of clones could be produced to fight wars.
Cloning makes us all less special by making us replaceable.