Benedict departure will leave little room for change
Tablet computers most wanted gift this holiday
Social Innovation Summit 2012 comes to an end
Teenager wins top prize for pancreatic cancer test
Watching for early signs of autism in babies
Michelle Obama stuns in Jason Wu gown
奥巴马发表农历蛇年贺词
Abduction prompts girl to fight back for all women
New technology used to track US flu outbreak(视频)
Now on the iPad: Apps for orangutans
Soaring population, climate change stress resources
India's youth keep spotlight on violence against women
Words and their stories: state nicknames, part 3
Signing the Constitution in Philadelphia
Washington insider Susan Rice could face tough nomination battle
Words and their stories: Losing it
What online teens consider 'research'
Killing of US school children sparks gun control discussion
New rules aim to improve US food safety
Discover America with American Mosaic!
A flower in winter: The story of the poinsettia
除了说声Good luck,你还能怎么祝人家好运?
How babies learn, when, and even in what position
Words and their stories: Santa Claus
California attracts cars of the future
Five actresses compete for coveted Oscar
40 years Later, US abortion opinions remain passionate
Words and their stories: Belittle
Ocean floor reveals past climate changes
Major progress in health through technology