US President Barack Obama warned Tuesday that his Egyptian counterpart Mohamed Morsi has a "responsibility to protect" the democratic principles advanced by the 2011 uprising.
The United States on Tuesday marked 10 years of war in Darfur, warning that without political talks the Sudan region may face another decade of the devastating conflict.
Lack of sleep has a potentially harmful effect on gene expression, according to a study out Tuesday that sheds light on the link between sleep deficits and a wide range of health conditions.
The makers of Budweiser faced accusations on Tuesday of watering down the popular American lager in search of higher profits, in a class action lawsuit flatly rejected by the brewery.
House Speaker John Boehner laid bare the Republican leadership's exasperation Tuesday over looming US budget cuts, as he demanded senators get "off their ass" to forge a compromise and avert a crisis.
With the United States days away from billions of dollars in automatic spending cuts, anti-poverty campaigners fear that reductions in foreign aid could potentially lead to thousands of deaths.
An investigation by a US academic has uncovered 50 unpublished poems by British writer Rudyard Kipling in locations including a New York house and the papers of a former cruise-line owner.
A US appeals court has labeled militant conservationist group Sea Shepherd as pirates, and cleared the way for Japanese whalers to pursue legal action against them.
The US Senate confirmed Chuck Hagel to be secretary of defense Tuesday, ending a long and acrimonious nomination process and handing President Barack Obama a boost as he fills his second-term cabinet.
Scientists said Monday they have identified a physical mechanism behind the extreme weather that has plagued many parts of the world in recent years -- and that it is tied to climate change.
Syria's opposition has cancelled a planned boycott of an international conference on the two-year conflict after appeals from Britain and the US, but rejected an offer of talks from Damascus.
The US government accused BP of letting greed triumph over safety Monday in the opening arguments of a multi-billion dollar trial over the devastating 2010 Gulf of Mexico oil spill.
Barack Obama may have the upper hand against Republicans in a high-risk new spending showdown, but a drawn-out clash would likely damage the economy and put his presidential legacy on the line.
Hollywood veteran Steven Spielberg left the Oscars empty-handed for the second year running, despite his film having the most nominations for Tinseltown's top awards show.
Ben Affleck's Iran hostage drama "Argo" won the coveted best film Oscar on Sunday, as other key prizes were shared among several films at the 85th Academy Awards, Hollywood's biggest night.
Mozilla Foundation announced Sunday it will launch in mid 2013 its widely anticipated Firefox operating system for smartphones in a direct challenge to the duopoly of Apple's iOS and Google's Android.
Tinseltown's A-list stars on Sunday offered up a healthy serving of old-school Hollywood glamour on the Oscars red carpet, with strapless gowns and pale colors most definitely in vogue.
Lightning-fast fourth generation mobile networks are spreading rapidly worldwide, led by the United States, Japan and South Korea, but Europe lags behind and its economic crisis could brake investment.