A nearly 50-year bid to explain a riddle of fundamental matter faces a key moment on Wednesday when physicists unveil fresh data in their search for a particle called the Higgs boson.
The prescription drug methadone is linked to over 30 percent of painkiller overdose deaths, according to a report released by the Centers for Disease Control (CDC) and Prevention Tuesday.
Pakistan agreed to reopen key supply routes into Afghanistan Tuesday, ending a bitter stand-off after US Secretary of State Hillary Clinton said she was sorry for the loss of life in a botched air raid.
Libyans vote on Saturday for a constituent assembly, the first body elected since the ouster of dictator Moamer Kadhafi, tasked with steering the country through its critical transition.
UN leader Ban Ki-moon said Tuesday it was a "disgrace" that there is no global arms trade regulation as he opened treaty talks held up by Palestinian demands for a place in the negotiations.
He noted that the lowest inflation rate since 1999 is bolstered by a number of factors, including somewhat decreasing prices for foodstuffs and crude oil.
The Mexican government declared a national animal health emergency on Monday in the face of an aggressive bird flu epidemic that has infected nearly 1.7 million poultry.
The runner-up in Mexico's presidential vote demanded a full recount of Sunday's balloting, raising fears he could lead disruptive mass protests like he did six years ago.
Four envoys of the International Criminal Court who were detained in Libya last month after visiting the son of slain leader Moamer Kadhafi arrived Tuesday in the Netherlands.
Japan and its allies shot down a Latin American-led proposal Monday to create a sanctuary for whales in the southern Atlantic Ocean, reigniting international tensions over Tokyo's whaling.
Tom Cruise was named the highest paid actor in Hollywood on Tuesday, on his 50th birthday -- but the "Mission Impossible" star has little to celebrate.
Nigeria on Monday signed a Memorandum of Understanding with an American energy firm to build six oil refineries, in a project worth 4.5 billion dollars.
Twitter said Monday in its first "transparency report" that the number of government requests for user information or to block content is rising in 2012.