Neither an infant one week old nor a snail is a rational creature. I f the infant survives long enough, he will probably become rational, while this is not true of the snail. If we like, we may say of the infant from the start that he is a rational creature because he will probably become rational i f he survives, or because he belongs to a species with this capacity. Whichever way we talk, the...

The technique of introducing new genetic material into the germline of mammals has been a major development in biotechnology over the last decades. ”Transgenic animals“ are animals whose chromosomes contain stable, integrated copies of exogenous genes, additional copies of endogenous genes or gene constructs. They are frequently created by two different techniques: microinjection of DNA into th...

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