The world's largest particle smasher restarted after a two-year upgrade that will allow physicists to explore uncharted corners of what makes up the universe.
Six Ukrainian troops were killed by landmines in the restive separatist-held east, breaking a lull of several days in a conflict that began a year ago this week.
Books on Islam are selling out in France after deadly extremist attacks in the capital raised uncomfortable questions about Europe's fastest-growing religion.
Greece will meet its financial obligations to the IMF, easing speculation that Athens could default on its debts with unknowable consequences for global markets.
British Prime Minister David Cameron and his austerity policies came under attack on Thursday from six other party leaders in the only full debate before next month's general election.
German Chancellor Angela Merkel said the international community had never "been so close to an agreement preventing Iran from having nuclear weapons".
Russian Foreign Minister said early that global powers had reached an agreement in principle on "all key aspects" of the outlines of an Iranian nuclear deal.
The co-pilot suspected of deliberately crashing a Germanwings plane had informed his employer that he had undergone a "previous episode of severe depression".
A demo of a new song by former One Direction star Zayn Malik has been posted online, sparking a row between its producer and one of Malik's former bandmates.