• Anti-austerity party wins Greek poll
The anti-austerity Syriza party wins the Greek general election promising to renegotiate the country's bailout in a challenge to international creditors.
• Boko Haram assaults Nigerian city
Nigerian Islamist Boko Haram fighters have attacked the strategically important north-eastern city of Maiduguri, with dozens reported dead.
• Sixteen killed in Egypt protests
At least 16 people are killed in Egypt during street protests marking the fourth anniversary of the start of the 2011 uprising.
• WHO vows reform after Ebola 'shocks'
The World Health Organization sets out plans for reform, admitting it was too slow to respond to the "horrific" Ebola outbreak in West Africa.
• Ukraine vows to 'calm' fighting
Ukraine's President Poroshenko vows to "calm" fighting with pro-Russia rebels in east Ukraine, a day after 30 people died in Mariupol.
• Nisman reporter flees Argentina
A journalist believed to have been the first to report the death of prosecutor Alberto Nisman says he has fled Argentina, fearing for his life.
• India and US seal nuclear deal
India and the US announce a breakthrough on a deal for supplying civilian nuclear technology, on the first day of President Barack Obama's visit.
• Hoax call made to David Cameron
Downing Street is to review security procedures after a hoax caller was put through to Prime Minister David Cameron, Number 10 says.
• Venezuela blocks access to Lopez
The Venezuelan authorities prevent the former presidents of Chile and Colombia from visiting jailed opposition leader Leopoldo Lopez.
• Sniper film 'stoking Islamophobia'
The release of the film American Sniper has led to an increase in threats against Muslims in the US, an Arab-American civil rights group says.
• Murray beats Dimitrov in epic
Andy Murray wins a gruelling late-night contest with Grigor Dimitrov to reach the Australian Open quarter-finals.
• VIDEO: Birmingham rally after Fox 'no-go' comment
A multi-faith rally partly prompted by a US TV pundit who claimed Birmingham was a "no-go zone" for non-Muslims has been held in the city.
• VIDEO: Australian Open feels like home - Nishikori
Japan's Kei Nishikori says the Australian Open feels like "home" ahead of his fourth round match against David Ferrer.
• VIDEO: Colin Firth on being an 'unlikely killer'
Actor Colin Firth has said the director of Kingsman: The Secret Service, Matthew Vaughn, cast him in the film because he was so unlikely to be seen as a cold killer
• VIDEO: One-minute World News
Watch the latest news summary from BBC World News. International news updated 24 hours a day.
• VIDEO: Bolivia's festival of miniatures
People in Bolivia have been holding a fair with a difference - everything is in miniature.
• VIDEO: Brazilians told to save water
Brazil's Environment Minister Izabella Teixeira has said the country's most populous region is experiencing its worst drought since 1930.
• VIDEO: Body clocks and blindness
Our eyes are key to resetting our body clocks. So what happens to people who can't see anything at all?
• VIDEO: Killer whale could be set free
In the next few days the authorities in the United States will decide whether to put killer whales on the list of endangered species.
• Is there a diversity dividend?
Studies have shown that diversity in the workplace leads to higher revenues and dividends, but there are still road-blocks on the route to achieving a more balanced labour force.
• Goldman Sachs warns on Britain and the EU
Goldman Sachs president tells BBC - don't risk London's position as global financial capital.
• Who killed Alberto Nisman - and why?
The death of former state prosecutor Alberto Nisman leads to conspiracy theories and questions in Argentina, the BBC's Wyre Davies reports from Buenos Aires.
• Obama in India: Things to watch
US President Barack Obama is heading for India, but what will get done?
• VIDEO: How do you 'bounce' water? - 15 Secs
Scientists at the University of Rochester in New York have developed "self-cleaning" metal that enables water droplets to gather dust particles, then bounce and slide away.
• Appy days: Must see tech stories
Rory Cellan-Jones, technology reporter and presenter of the Tech Tent radio show, gives a round-up of the BBC's coverage of the week's big tech stories.
• Abraham Lincoln hair fetches $25,000
A lock of President Abraham Lincoln's hair fetches $25,000 (£16,600) at an auction of memorabilia that sells for more than $800,000 in total.
• Post-traumatic stress 'in 1300BC'
Evidence of post-traumatic stress disorder can be traced back to 1300BC - much earlier than previously thought - say researchers.
• Euro falls sharply on Syriza victory
The euro falls sharply against the dollar after the anti-austerity Syriza party wins the Greek general election.
• Aer Lingus 'to accept' new IAG bid
Irish airline Aer Lingus is set to approve a takeover bid by British Airways owner IAG, the BBC understands.
• Reporter jailed for stolen data links
A journalist with connections to the hacking collective Anonymous is sentenced to five years in jail after posting online links to stolen data.
• US plans 'regulated' Bitcoin exchange
High-profile Bitcoin backers are seeking to establish a Bitcoin exchange in the US that would be overseen by mainstream financial regulators.
• Birdman given boost in Oscars race
Michael Keaton's film Birdman emerges as a strong contender for the Academy Awards after being given the Producers Guild of America's top prize.
• US talk show pioneer Franklin dies
Joe Franklin, who was a New York TV host for 43 years and is credited by some as having invented the talk show format, dies at the age of 88.
• Eyes on Pluto for historic encounter
Nasa's mission to Pluto gets under way in earnest as the New Horizons probe starts taking the pictures needed for July's close fly-by.
• Jellyfish 'can sense ocean currents'
A jellyfish tagging study reveals the creatures' ability to swim against the current when forming their submarine swarms, say researchers.
• Ebola vaccine 'shipped to Liberia'
The first batch of a vaccine against Ebola is on its way to Liberia and trials are expected to start soon.
• Exercise advice is 'unrealistic'
Researchers say current exercise guidelines are unrealistic and argue doctors should promote small increases in activity instead.
• Brighton & Hove Albion 2-3 Arsenal
Defending champions Arsenal reach the FA Cup fifth round but are forced to hang on for a 3-2 victory at Championship side Brighton.
• Uefa lack courage to stand - Blatter
Fifa president Sepp Blatter accuses Uefa of lacking the "courage" to challenge his leadership in May's election.
• The sheikh who listened to Nazi radio
Early in World War Two, Britain's agent in Sharjah noticed an alarming rise in support for Nazi Germany - so he slipped on a disguise to find out who was responsible.
• The lost sons
The story two murdered teenage boys, an Israeli and a Palestinian, whose mistake was to stand by the side of a dark road.
• Fake bank swindles China savers
Building was made to look just like a real bank with uniformed staff serving customers.
• Ghana official wears wife's coat
Ruling party official laughs off criticism for donning the fur-trimmed number on visit to Germany.
• Gabon 0-2 Equatorial Guinea
Hosts Equatorial Guinea make it through to the Africa Cup of Nations quarter-finals by beating Gabon.
• Failed bid to raise AirAsia fuselage
The Indonesian official leading efforts to recover AirAsia flight QZ8501 says the fuselage appears to be too fragile to be lifted, after failed bids to raise it.
• Cruise ship hit by engine room fire
A cruise ship with more than 1,000 people on board was left temporarily without power off the coast of Morocco after a fire in the engine room.
• Brazil in 'worst water crisis'
Brazil's Environment Minister Izabella Teixeira says the country's most populous states are experiencing their worst water crisis since 1930.
• Libya's Ansar confirms chief's death
Libya's Islamist group Ansar al-Sharia confirms its leader Mohammad al-Zahawi has died, after apparently being wounded in October.
• US planes targeted by bomb threats
Police search two aircraft at Atlanta's airport after receiving "credible" bomb threats - but later give the all-clear.
• Farage hits back at defecting MEP
An MEP who has defected to the Conservatives had "reached the end of the road" with UKIP, party leader Nigel Farage says.
• BHS takeover approaches considered
Sir Philip Green is considering selling the department store chain BHS after receiving "several approaches".
• Tories 'close to TV debates deal'
The Conservatives are close to agreeing to new plans for pre-election television debates, the party's chairman Grant Shapps says.
• Can Labour pay for university fee cut?
We may be about to learn how much of a constraint Labour's promise to make no unfunded spending promises really is.
• Week in pictures: 17-23 January 2015
News photos from around the world
• Day in pictures: 23 January 2015
Images from around the world: 23 January
• Picture power: Tear gas at Kenyan primary school
Story behind the Kenyan protest photo
• Instagram: The 'homeless' chief executive
Cillin Perera's daily photographic project
• In Pictures: Snowfall around the UK
Images from around the UK
• Day in pictures: 21 January 2015
Images from around the world: 21 January
• In pictures: Infrastructure in focus
Winning images from this year's RICS photo competition
• Your Pictures
A selection of your photos from around Wales
• Where do the wealthiest 1% live?
Where do the wealthiest 1% live?
• The islanders who don't want a bridge to the mainland
The islanders who'd rather not be linked to the mainland
• Why tyrants are afraid of art and beauty
Why tyrants are afraid of art and beauty
• Deadly dip: baseball's toxic tradition
The fight against baseball's toxic tradition
• Can Fast4 do for tennis what Twenty20 has done for cricket?
Can a speedy new format attract more people to tennis?
• VIDEO: Laughing the Indian America way
A comedian's take on India-US relations
• Is Thailand's 'phoney war' over?
Impeachment of ex-PM Yingluck Shinawatra is a major step
• Your pictures: Cold weather
Readers' photos on the theme of 'cold weather'
• Weekendish: The best of the week's reads
The best features you may have missed this week
• Go Figure: The week in numbers
A look back at the week in numbers