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Time is running out for the leap second
Abolition would see 'official' time unmoored from the Sun.
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.
Fresh dispute about MMR 'fraud'
Pathology records are at the centre of a new disagreement over disgraced medic Andrew Wakefield.
Tyrannosaurs were power-walkers
Limb analysis suggests dinosaurs moved with short, fast strides.
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.
Experience counts for Nobel laureates
Study of prizewinning scientists suggests greatest discoveries are now made by middle-aged researchers, not young ones.
Artificial intelligence finds fossil sites
Palaeontologists use computer neural network and satellite images to work out where to dig.
US lawsuit extends thalidomide's reach
Drug blamed for a broader range of harmful effects.
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.
The pollinator crisis: What's best for bees
Pollinating insects are in crisis. Understanding bees' relationships with introduced species could help.
Aid organizations tap into social-science expertise
Behavioural and cultural studies seen as key to success of public-health initiatives.
A struggle for power
Brazil is developing the last great untapped reserve of hydroelectricity, the Amazon basin.
Drug research feels Europe's pain
Pharma companies see drops in revenue amid European austerity measures.
Dragon offers ticket to Mars
A cargo carrier designed for low Earth orbit could provide a cheap route to the red planet.