A South Korean court says studies conducted to evaluate safety at Samsung chip factories failed to fully examine workplace health hazards.

The finding by the Seoul Administrative Court is part of a ruling on the case of a Samsung worker who died of leukemia in 2009 aged 29.

U.S. obstetricians are getting more precise about exactly what determines a full-term pregnancy.

On average, a pregnancy lasts 40 weeks, counting from the first day of the woman's last menstrual period. That's how a due date is estimated.

Top-ranked Serena Williams breezed past Angelique Kerber 6-3, 6-1 to open her bid for a fourth ATP Championships title on Tuesday.

Williams, the defending champion, had no trouble against Kerber, who also lost to the American 6-4, 6-1 in the round-robin at this event last year. Kerber was the only player to beat Williams last year - in Cincinnati - after the American's first-round ouster at the French Open.

Athletes who fail to clinch gold at the 2014 Sochi Winter Olympics can take home something else: a $900 smartphone from Samsung.

Samsung Electronics Co. is giving the Galaxy Note 3 smartphone to all athletes competing at the Sochi Games in February.

Any time an NBA franchise is trying to do something only previously done by the Boston Celtics and Los Angeles Lakers, that's rarefied air.

That's what the Miami Heat is trying to reach this season.

Lionel Messi preserved Barcelona's unbeaten start to the Champions League by equalizing in a 1-1 draw at AC Milan while Arsenal's 100 percent record disappeared with a 2-1 home defeat to Borussia Dortmund in Tuesday's other marquee match.

Atletico Madrid made it three wins from three thanks to a double from in-form striker Diego Costa in a 3-0 victory at Austria Vienna, leaving the Spanish side on the brink of the last 16 already to continue its brilliant start to the season.

Oprah Winfrey has paid a visit to two of the graduates from the celebrity's school in South Africa who are enrolled at a private college in upstate New York.

A spokeswoman for OWN, Winfrey's cable channel, says Tuesday that the former daytime talk-show queen was at Skidmore College in Saratoga Springs on Monday to meet with two graduates from Winfrey's Leadership Academy for Girls. The academy, a boarding school for underprivileged South African girls, opened in 2007.

The Missouri Department of Corrections said Tuesday it is switching to a new lethal injection drug, less than two weeks after the governor halted executions until it could find a replacement for the anesthetic propofol.

The Corrections Department said in a news release that it will use the sedative pentobarbital. Death Penalty Information Center director Richard Dieter said 13 states use the drug for executions. He said every execution but one over the past two years in the U.S. used pentobarbital.

Yoga is moving from the studio mat to a U.S. museum gallery.

The Smithsonian Institution has organized what curators believe is the first exhibition about the visual history and art of yoga, its origins and evolution over time.

Marriage is coming after the baby carriage for Kim Kardashian and Kanye West.

Kardashian's publicist, Ina Treciokas, confirmed Tuesday that the couple are engaged.