While working on a cybersecurity podcast, journalist Claire Aird reads a startling statistic: Ninety per cent of people with European ancestry in the US are identifiable because of DNA data their relatives have uploaded to a family history database. Claire’s curiosity soon becomes an investigation into how our DNA is being used for power and profit. In this episode of Should I Spit?, Claire finds out that the DNA data on genealogy sites is never fully anonymous, so she starts to interrogate how police really use these sites to hunt for criminals, overseas and in Australia.

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