Australia's High Court has overturned legislation allowing gay marriage in the Australian Capital Territory (ACT), rendering 27 gay marriages invalid.
Pope Francis has been named Person of the Year by Time for the "strength of the symbolism" of his actions.
Town remembers 20 children killed in a mass shooting a year ago
Hilton Worldwide raises $2.35bn (£1.4bn) through a share sale, making it the second-largest initial public offering (IPO) in the US this year.
Sex offenders found to have abused their position of power could face longer jail terms under new guidelines in England and Wales.
Australia's government is holding talks with Toyota as it looks to convince the firm to continue manufacturing cars there.
A cave on the northwestern coast of Sumatra holds a remarkable record of big tsunamis in the Indian Ocean stretching back thousands of years.
Air Canada orders 61 Boeing 737 MAX planes worth $6.5bn (£4.2bn) at list prices, a big win for the planemaker over rival Airbus.
Pumza Fihlani's vivid account of seeing the man who made her life possible
The dancing grannies who love loud music
Watch the latest news summary from BBC World News. International news updated 24 hours a day.
A new review of "legal highs" could lead to sweeping changes to UK drug legislation, the Home Office says.
The Earth could have been struck by many more huge earthquakes in its recent history than was previously thought, scientists say.
Inspectors reveal a catalogue of failings at some GP practices in England with drugs stored incorrectly and rooms so dirty they had maggots.
A top Republican senator's chief of staff is arrested on suspicion of possession and distribution of child pornography, the US authorities say.
How Cirque du Soleil became a billion dollar global business
The UN is "extremely concerned" for Syrian refugees in Lebanon as a winter storm brings snow, high winds and freezing temperatures to the country.
Rent arrears are becoming the fastest-growing debt problem in the UK, according to the Money Advice Trust.
Argentinean demonstrators confronted police after a wave of looting spread through several provinces.
Sign language experts and deaf viewers complain that the interpreter at Nelson Mandela's memorial service was a "fake" who was "signing rubbish".