US President Obama had a packed day in Berlin, climaxing in a speech to the German people.
Scientists have worked out a new way to save Australia's Great Barrier Reef. The group is putting together a coral sperm bank, in order to archive the genetic make-up of the coral and protect the reef for future generations.
Riot police in Ukraine have moved in on protest camps in the heart of the capital, Kiev. They have been pulling down barricades in a bid to dislodge protestors who have been blocking official buildings, demanding the government resign. At the same time, President Viktor Yanukovich has backed calls for dialogue with the opposition.
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