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Words and their stories: State nicknames, part 4

US president attends inaugural prayer service

40 years Later, US abortion opinions remain passionate

Words and their stories: Belittle

Epilepsy disorder suffered by millions around the world

How babies learn, when, and even in what position

Signing the Constitution in Philadelphia

Washington insider Susan Rice could face tough nomination battle

Is investing in Africa a good bet?

Discover America with American Mosaic!

France deploys special forces as terrorism fears grow

Gay rights groups push for anti-discrimination laws

Televisions stole the spotlight at the consumer electronics show

Soaring population, climate change stress resources

New rules aim to improve US food safety

Getting a firm grip on weed control

Words and their stories: food expressions

A flower in winter: The story of the poinsettia

What online teens consider 'research'

US economy faces another cliff

Lifelong bilingualism gives seniors mental edge

A new way to shop: The fashion truck

Words and their stories: state nicknames, part 3

E-commerce challenges traditional stores

India's youth keep spotlight on violence against women

California attracts cars of the future

Tablet computers most wanted gift this holiday

Up to half of world food production is wasted(视频)

Tattoos illustrate art of saving lives