The mother of seven of the children found dead in a home in the Australian city of Cairns, has been arrested on suspicion of murder although she has not been charged.
Millions of monarch butterflies have arrived in Mexico's forests as part of their annual migration from Canada and the United States.
A FBI sting operation has led to the recovery of stolen artwork worth about $12m (£7.7m) including paintings by Marc Chagall and Diego Rivera.
Aerial photographs from the 1940s and 1950s are being used to probe the climate history of the Antarctic Peninsula.
The State Department is warning Americans traveling abroad to be extra cautious over the holidays.
How refugees in the northern US learn to walk on ice
Kashmir's widows carry the scars of conflict
Virtual battle for eastern Ukraine
The U.S. Supreme Court on Friday refused to block gay marriages in Florida, the latest of about three dozen states allowing same-sex weddings.
Charities warn patients are not being taught how to use potentially life-saving asthma inhalers and allergy auto-injectors correctly.
The timing of Alastair Cook's removal as England one-day captain was "naughty", according to Steve Harmison.
Agents for the embattled state Government Accountability Board in Wisconsin continued a zealous campaign finance investigation into dozens of conservative groups even after judges who preside over the board voted to shut it down, according to a previously sealed brief made public Friday.
President Obama vows to respond to an alleged North Korean cyber-attack on Sony Pictures, but says cancelling a film release was "a mistake".
President Barack Obama on Friday signed into law a massive defense policy bill that endorses his plan to fight Islamic State militants, including air strikes, training of Iraqis and moderate Syrian rebels.
Flipping the script on a Republican rival, Kentucky Sen. Rand Paul on Friday criticized Florida Sen. Marco Rubio as "an isolationist" as the GOP's intra-party feud over President Obama's new Cuba policy intensified. The charge was unusual for the libertarian-minded Paul, often cast as an isolationist himself. On Friday, however, Paul made the case for opening up trade and engagement with communist Cuba.
Arjen Robben's last-minute winner ensures German leaders Bayern Munich end a successful 2014 with a dramatic win at Mainz.
US swimmer Michael Phelps, the most decorated Olympian of all-time, gets a one-year suspended jail sentence after pleading guilty to drink-driving.
Former France and Barcelona defender Eric Abidal announces his retirement from football.
The Pentagon will allow some 120 officers forced into retirement to leave with full benefits, an about-face from a previous policy that would have seen them retire at their highest enlisted rank if they spent fewer than eight years as an officer.
Troubled smartphone maker Blackberry reports a larger than expected drop in revenue, as it struggles to convince consumers to buy its phones.