Science can pose ethical questions I struggle with. Fortunately, I don't have to cast decisive votes on important science policies. UK MPs have just voted to approve a controversial fertility treatment - an idea supported by many prestigious scientists and advisers.
The treatment replaces a small amount of harmful DNA in an embryo with healthy DNA from a third 'parent'. I'm undecided. The technique could change the lives of some prospective families. But it's manipulating human life at its earliest stage, which makes me uneasy. I hope the scientists get it right.