Meat was main dish for early humans
Slow progress on curbing deforestation expected at climate conference
Research grows through citizen science
Rare fungal meningitis outbreak in United States
Unusual Mars rock surprises rover scientist
Feed the soil, feed the crops
William Shakespeare: Star of stage and screen
US president chosen by electors, not popular vote
Musical legend Chuck Berry still reeling and rocking on stage at 86
Polio victim searches for love in 'The Sessions'
Femen's topless protest tactics hit Paris(视频)
Some illegal immigrants allowed to stay under Obama order
Early detection and treatment a must for glaucoma patients(视频)
Was Jesus married?
Interfaith worshipers celebrate sea, surf
When it comes to beer, variety rules in USA
Cheating scandal threatens Harvard's image
South pacific islands now totally powered by the sun
Effort underway to boost US voter participation(视频)
'Haunted Houses' attract big crowds on Halloween
Many millions suffer from depression
Student street clinic helps homeless(视频)
Words and their stories: Fall guy
Apollo's final missions: The last footsteps on the moon
United Nations report urges
Tests show levels of arsenic in US rice(视频)
Clowning around; making magic; hair care for less
Mob museum hits Vegas, but it's no sure bet
Seeking HIV tests for all in US age 15-65
Demand for wheat growing in Sub-Saharan Africa