除了说声Good luck，你还能怎么祝人家好运？

Now on the iPad: Apps for orangutans

奥巴马发表农历蛇年贺词

Ocean floor reveals past climate changes

E-commerce challenges traditional stores

Michelle Obama stuns in Jason Wu gown

What online teens consider 'research'

Home TB treatment is helping patients in Swaziland

WHO warns of malaria resurgence

Soaring population, climate change stress resources

Words and their stories: Belittle

Gay rights groups push for anti-discrimination laws

Words and their stories: Santa Claus

Watching for early signs of autism in babies

Britain could be on oath to EU exit(视频)

Major progress in health through technology

How babies learn, when, and even in what position

US economy faces another cliff

Is investing in Africa a good bet?

New technology used to track US flu outbreak(视频)

Inaugural festivities put the 'party' into political parties

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

Tablet computers most wanted gift this holiday

Benedict departure will leave little room for change

Words and their stories: Losing it

Getting a firm grip on weed control

Music would not be the same without the guitar

Washington insider Susan Rice could face tough nomination battle

Discover America with American Mosaic!

India's youth keep spotlight on violence against women