Social Innovation Summit 2012 comes to an end

New technology used to track US flu outbreak(视频)

奥巴马发表农历蛇年贺词

Michelle Obama stuns in Jason Wu gown

30,000 Sandy-damaged cars stored on eastern Long Island

Televisions stole the spotlight at the consumer electronics show

Benedict departure will leave little room for change

California attracts cars of the future

Gay rights groups push for anti-discrimination laws

How babies learn, when, and even in what position

除了说声Good luck，你还能怎么祝人家好运？

Killing of US school children sparks gun control discussion

Epilepsy disorder suffered by millions around the world

US president attends inaugural prayer service

A flower in winter: The story of the poinsettia

E-commerce challenges traditional stores

Teenager wins top prize for pancreatic cancer test

Words and their stories: Losing it

Watching for early signs of autism in babies

Words and their stories: State nicknames, part 4

Getting a firm grip on weed control

United States Senate's process of confirming the president's nominees

Music would not be the same without the guitar

Five actresses compete for coveted Oscar

Abduction prompts girl to fight back for all women

Words and their stories: Santa Claus

California voters reject food labeling requirement

Soaring population, climate change stress resources

US economy faces another cliff

Tablet computers most wanted gift this holiday