Immortality and everlasting youth are the stuff of myths, according to new research which may finally end the eternal debate about whether we can live for ever. Backed by governments, business, academics and investors in an industry worth $110bn (£82.5bn) – and estimated to be worth $610bn by 2025 – scientists have spent decades attempting to harness the power of genomics and artificial intelligence to find a way to prevent or even reverse ageing. But an unprecedented study has now confirmed that we probably cannot slow the rate at which we get older because of biological constraints.