Your wrap of the world stories that broke overnight.
1. The US presidential candidates have turned their attention to New Hampshire after Iowa officials confirmed Hillary Clinton had won narrowly against Bernie Sanders on the Democrat side. New Hampshire holds a primary next week. It has a more politically moderate and less religious electorate than Iowa - which puts Republican winner Ted Cruz at a disadvantage. Sanders is a senator of neighbouring Vermont and has a handy lead in opinion polls over Clinton. The Democrats hold a debate on CNN tomorrow.
2. North Korea is to launch a rocket. It has issued formal notification to the UN of a plan to launch a satellite. The move is a breach of UN resolutions following last month's nuclear test.
3. Scientists at the University of Vienna studying ravens have found a capacity for abstraction in the birds' behaviour in hiding food. Ravens can imagine being spied on by a hidden competitor. Scientists say it shows they are capable of understanding what might be going on in the mind of another.
4. The Chinese new year migration is underway with huge crowds on the move. At least 100,000 travellers were stuck for a while at Guangzhou's main railway station during cold weather which saw at least 23 trains delayed. State media reports that thousands are still there.