A fascinating new study this week showed that people who have minds that wonder more, who cannot concentrate as much, also have shorter telomeres, a classic biomarker for ageing and cellular death. Telomeres protect the end of chromosomes and are a good predictor of immune functioning, early death and disease . Participants were measured for aspects of psychological distress and well-being. The sample was highly educated and had a narrow range of both chronological age and psychological stress (most were low stress). Those with a tendency to mind wander and concentrate less on tasks basically had shorter telomeres. Given that so much is suggesting that people’s attention spans are shortening, then this is a worrying finding.