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A struggle for power

Brazil is developing the last great untapped reserve of hydroelectricity, the Amazon basin.

Experience counts for Nobel laureates

Study of prizewinning scientists suggests greatest discoveries are now made by middle-aged researchers, not young ones.

Corrections

Time is running out for the leap second

Abolition would see 'official' time unmoored from the Sun.

Fresh dispute about MMR 'fraud'

Pathology records are at the centre of a new disagreement over disgraced medic Andrew Wakefield.

Seven days: 4–10 November 2011

The week in science: China's first docking in space; six men complete 520-day virtual mission to Mars; and GSK pays US$3billion to settle investigations.

Artificial intelligence finds fossil sites

Palaeontologists use computer neural network and satellite images to work out where to dig.

Tyrannosaurs were power-walkers

Limb analysis suggests dinosaurs moved with short, fast strides.

Aid organizations tap into social-science expertise

Behavioural and cultural studies seen as key to success of public-health initiatives.

Seth Stein: The quake killer

The US government says that a huge earthquake risk lurks in the heart of the country, where a series of large shocks hit 200 years ago. Seth Stein says that kind of warning is dead wrong.

The pollinator crisis: What's best for bees

Pollinating insects are in crisis. Understanding bees' relationships with introduced species could help.

US lawsuit extends thalidomide's reach

Drug blamed for a broader range of harmful effects.

Dragon offers ticket to Mars

A cargo carrier designed for low Earth orbit could provide a cheap route to the red planet.

The road to fraud starts with a single step

The extensive academic fraud of Diederik Stapel has rocked science. Social psychologist Jennifer Crocker traces the destructive path that cheats follow.

Drug research feels Europe's pain

Pharma companies see drops in revenue amid European austerity measures.