Islamic State militants fighting in Iraq and Syria released a video on Saturday that purported to show the beheading of British aid worker David Haines.
The fate of the United Kingdom remained unclear five days before a historic referendum on Scottish independence as three new polls on Saturday showed a slight lead for supporters of the union, but one saying the separatist campaign was pulling ahead.
Iraq's Shi'ite Prime Minister Haider al-Abadi said on Saturday that he had ordered his air force to halt strikes on civilian areas, following attacks by both Iraqi and U.S. jets in large areas of the country held by Islamic State fighters.
An Acura RLX sedan demonstrated an unusual way to tow another car this week: the vehicles were not physically attached. The second car drove itself, following instructions beamed over by the first in a feat of technology that indicates a new stage in automation is happening faster than many expected.
Olympic and Paralympic track star Oscar Pistorius was convicted of culpable homicide on Friday, escaping the more serious charge of murder for the killing of his girlfriend, and will now battle to avoid going to prison.
About one in four National Football League players are likely to end up suffering dementia, Alzheimer's disease, Parkinson's disease or other cognitive impairments during their lifetime, according to a report filed in court by the league's lawyers.
Minnesota Vikings star running back Adrian Peterson was released from Montgomery County, Texas, jail early Saturday morning after posting a $15,000 bond.
Police in three states searched on Saturday for a gunman who ambushed two state troopers, killing one of them, in an attack at a law enforcement barracks in Pennsylvania, police said.
Two Russian cosmonauts and a NASA astronaut returned to Earth on Wednesday, capping a nearly six-month stay aboard the International Space Station.
A rare double burst of magnetically charged solar storms will hit Earth Thursday night and Friday, raising concerns that GPS signals, radio communications and power transmissions could be disrupted, officials said on Thursday.