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1. Decorated snail shell in a cave in Iraq could be evidence of Paleolithic bling

   A tiny artefact with complex incisions tells us about prehistoric ornamentation, writes Professor Chris Hunt

2. How we can use light to fight bacteria

   This research could provide an answer to some of the problems posed by antibiotic resistance

3. How parasites and bacteria could be changing the way you think and feel

   From losing inhibitions to dementia – Lecturer in Genetics Dr Robbie Rae explores the role small critters play in a range of illnesses and behaviours

4. Knife crime and gangs: how a decade of bad policy left deprived young people without real choice

   England’s dramatic rise in gang-related knife crime has been called a “disease” by the UK home secretary, Sajid Javid, and amid the daily drama of Brexit the prime minister, Theresa May, has called a summit of 100 experts to Downing Street to discuss the issue.