World News Update, what you need to know

US President Barack Obama is keen to pick Malcolm Turnbull's brain regarding ongoing efforts to combat the "parent tumour" of Islamic State extremism, following the prime minister's weekend visit to the Middle East.

ELSEWHERE:

LONDON - Scientific progress is almost certain to bring disaster to planet Earth within the next few thousand years, according to top cosmologist Professor Stephen Hawking.

FRANKFURT - Twitter has resolved outages caused by a glitch in a software update that affected the social network on computers and phones, widely reported across Europe, the Middle East, Africa and North America.

MEXICO CITY - Mexico has opened a money laundering investigation into the actress who helped Hollywood star Sean Penn conduct an interview with drug lord Joaquin "El Chapo" Guzman.

GENEVA - Thousands of refugee children travelling along the migration route through Turkey and southeastern Europe are at risk from a sustained spell of freezing weather in the next two weeks.

NEW YORK - Coca-Cola, under pressure as consumers shift away from sugary drinks, is unveiling a new campaign that for the first time unites its most well-known slate of drinks under a single marketing theme.

DUBLIN - Ireland's police force has appealed for public help to identify a man whose torso was found in a suitcase floating down a canal.

LONDON - A woman phoned British police to report that there was a large poisonous spider in her home preventing her from leaving.