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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. A chimpanzee cultural collapse is underway, and it’s driven by humans

   Chimpanzees now face the daunting task of surviving in a habitat increasingly infested and assaulted by humans. And as their populations decline, so does their behavioural variation. In short, humans are causing chimpanzee cultural collapse.

3. 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.