Facebook will begin testing a new feature allowing users in Ireland and Spain to express a range of emotions on posts -- but there will be no "dislike" button, the social network said.
US Defence Secretary Ashton Carter predicted Russia would soon begin suffering casualties in Syria, as Moscow dramatically ramps up its military campaign in the devastated nation.
Vice President Joe Biden, who has spent months mulling whether to jump into the 2016 White House race, received strong encouragement when a pro-Biden group released a TV ad urging him to run.
Sweden's Tomas Lindahl, Paul Modrich of the US and Aziz Sancar, a Turkish-American, won the 2015 Nobel Chemistry Prize for work on how cells repair damaged DNA.
Former US president Bill Clinton attributed outspoken Republican presidential hopeful Donald Trump's current success in surveys to his skills as a 'master brander' but said his appeal could be short-lived.
US Defence Secretary Ashton Carter arrived in Madrid, beginning a European tour amid alarm over Russian bombardments in Syria and the refugee crisis sparked by the conflict.
President Barack Obama has voiced anger and sadness over "routine" mass shootings in the United States after 10 people were killed in an attack at a community college in Oregon.
American R&B singer Chris Brown thanked New Zealand women's advocates for supporting his plan to perform in the country, despite a domestic violence conviction which could see him banned.