From the Newswire

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Sir Paul on Arctic: 'Let it be'

Greenpeace is launching a campaign backed by stars like Sir Paul McCartney to have the Arctic region declared a sanctuary by the United Nations.

• Poems and politics at Rio's heart
• Arctic oil deal signed by Rosneft

'Magnetic emulsions' clean up oil

Researchers demonstrate "emulsions" that respond to magnetic fields in an advance that could revolutionise the cleanup of oil spills.

• Magnetic soap hope for oil spills

• Waste land vital for UK wildlife

  Brownfield or waste land sites are valuable and overlooked habitats for rare UK species, say conservationists. BBC Nature
  

• 'Giant wombat' mass grave found

  Australian scientists find 50 skeletons from a pre-historic "giant wombat" - described as a "palaeontologists' goldmine".
  

• Nuclear energy 'needs billions'

• 'Slow' progress on Earth problems

• US to seize $1m dinosaur skeleton

• New window into earliest Universe

• Scots agree US stem research deal

• Telescope to probe dark universe 

• Drones to take on Nepal poachers

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• DNA could hold key to the Queen of Sheba mystery