Editor's note

The 2011 riots in England were described as a disease that spread from city to city. But this 150-year-old idea of crowd behaviour being “contagious” doesn’t match the experience of those who took part, according to new research. John Drury explains why a shared anti-police identity was more important in shaping the riots than any mindless mob mentality.

Gold is rarely found in clean, shiny lumps in the ground. The truth is much dirtier. It can take 30 tonnes of unwanted rock to generate a wedding ring, and nasty chemicals like cyanide are used to extract the precious metal. Stephen Tuffnell looks at the toxic legacy of gold mining.

There’s “good” cholesterol (HDL) and “bad” cholesterol (LDL) – or so most people thought until a recent study showed that people with very high levels of good cholesterol were much more likely to die prematurely. You might think that this means that good cholesterol needs a new moniker. James Brown explains why it doesn’t.

Any Conversation fans in Brighton this week should make their way to the British Science Festival box office where our science editors will be offering tips for writing and how to get your story idea in The Conversation.

Stephen Harris

Commissioning Editor

Top story

Lewis Whyld/PA Archive/PA Images

English riots 2011: new research shows why crowd behaviour isn't contagious

John Drury, University of Sussex

Rioters were influenced by a shared anti-police identity – not just mindless violence.

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