Humanity has come a very long way since we were hunter gatherers in Africa. The ability to manipulate the very code of life itself will remain one of our greatest achievements, I believe, if not for the ethics, in what it represents. And here, we have scientists manipulating (or trying to) the DNA of sperm, in this case to reduce the risk of cancer.
So, NSG-is this good or bad? Is this ethical? And genetic engineering as a whole-What should be done?