Playing God - Documentary - 1 hour

Adam Rutherford meets a new creature created by American scientists,
 the spider-goat. It is part goat, part spider, and its milk can be used to 
create artificial spider’s web.
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.