It is part of a new field of research, synthetic biology, with a radical aim: to break down nature into spare parts so that we can rebuild it however we please.
This technology is already being used to make bio-diesel to power cars. Other researchers are looking at how we might, one day, control human emotions by sending 'biological machines' into our brains."
There are some clips from this show currently (26/1/12) here: http://www.bbc.co.uk/programmes/b01b45zh/clips and the program link is here: http://www.bbc.co.uk/programmes/b01b45zh
This raises many medical and scientific ethical questions. Is this right? Are the scientists really 'playing God'?