You can learn a lot by watching tonight’s episode of Nova – or at least I did. I thought CRISPR was the way I liked my BACN – but it turns out CRISPR is the name of a tool for editing the human genome. CRISPR could help isolate and eliminate genetic deficiencies in human DNA. It also, however, could allow parents to choose their children’s physical features and other attributes, which basically is the plot of at least 20 percent of all dystopian sci-fi stories ever written. So now we have a way of shaping people from before birth – but should we? And will we? Two very different questions. Check local listings. For a full review, see Alex Strachan's TV That Matters.

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