We have another example of one, which scares me. The question "should we" is not asked often enough in science today.
Unfortunately this is just the tip of the iceberg.
The milk produced by the transgenic cows is identical to the human variety, with the same immune-boosting and antibacterial qualities as breast milk, scientists at China's Agricultural University in Beijing said.
The transgenic herd of 300 was bred by inserting human genes into cloned cow embryos which were then implanted into surrogate cows. The technology used was similar to that used to produce Dolly the sheep, the first mammal to be cloned by scientists, in Scotland.
The milk is still undergoing safety tests, but with government permission it will be sold to consumers as a more nutritious dairy drink than cow's milk.