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1. 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

2. 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

3. Footprint fossils suggest lizards have been running on two feet for 110 million years

   Bipedal movement has existed in modern reptiles for much longer than we previously knew, writes Dr Peter Falkingham