ARE SCIENTIFIC EXPERIMENTS HAVE A LIMIT?

Scientific experiments are used in the world of medicine and beauty products. For example scientific experiments find out if cosmetics products are good or bad and also if cures for illnesses can be discovered.

Scientific experiments began long time ago. Nevertheless, where is the limit?

On the one hand experiments are good. Nowadays a lot of scientists are studying cures for cancer, hepatitis or ohter illnesses that until now hasn't got a cure. Fortunately, the makority of people who have had illnesses like these, they can now get cured. Another positive thing is that shampoos, make up and other cosmetics have been tested before we put them on our head or face.

On the other hand some experiments are bad. Scientists try to be God but it is impossible. In some countries children's parents can decide if their son will be a girl or a boy, the eyes colour and other important things. This experiment is not natural.

Therefore, is it necessary?

In my opinion, scientific experiments must have limits. I think that scientist can't play with life's person or with animals only for stupid topics like beauty. 

Therefore, scientists should investigate only cures for illnesses or important things not for beauty and make up because thanks to beauty's experiments, have we got a better heart?