Meat was main dish for early humans

Consumer spending will decline unless Congress averts fiscal cliff

Early detection and treatment a must for glaucoma patients(视频)

Seattle, 'City of Clocks' keeps on ticking

World AIDS Day 2012 more hopeful than in past

Rare fungal meningitis outbreak in United States

South pacific islands now totally powered by the sun

Apollo's final missions: The last footsteps on the moon

Slow progress on curbing deforestation expected at climate conference

Words and their stories: Fall guy

American history: A new world clash of cultures

William Shakespeare: Star of stage and screen

Musical legend Chuck Berry still reeling and rocking on stage at 86

How to win a debate, Presidential or otherwise

Effort underway to boost US voter participation(视频)

Obama calls human tafficking 'slavery'

Student street clinic helps homeless(视频)

Colonizing expands in the American Northeast

Was Jesus married?

When it comes to beer, variety rules in USA

Music classes in childhood may lead to changes in the brain

Demand for wheat growing in Sub-Saharan Africa

United Nations report urges

Unusual Mars rock surprises rover scientist

Violin maker keeps family tradition alive

Some illegal immigrants allowed to stay under Obama order

How overfishing threatens Asia's wild fish stocks

Nobel Prize in economics recognizes 'market designers'

Conflict presses Syrian economy

Obama appeals to public about 'fiscal cliff'