A new study finds that rising levels of carbon dioxide drove rising temperatures at the end of the last ice age. The findings contrast with previous studies, which skeptics of human-triggered global warming said showed that CO2 levels weren't an important factor.
Wisconsin recall election between Gov. Scott Walker (R) and Tom Barrett (D) enters its last furious week. It is a proving ground for the themes and players of the national election in November, analysts say.
What happens when ordinary people decide to pay it forward? Extraordinary change. See how individuals are making a difference...
Mae Azango has gone undercover to report on female circumcision, a rite of the Sande society in Liberia that is performed on young girls.
Mae Azango exposed a secret ritual in Liberia, putting her life in danger
When journalist Mae Azango wrote about a secret women's circumcision ritual in Liberia, she received death threats.
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