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In Ethiopia, churches may hold the key to protecting threatened species.

Teresa L. Carey, Contributor

A new model describes how floating ice can get jammed in a narrow strait, creating a giant frozen walkway.

Charles Q. Choi, Contributor

Scientists find first evidence that oil from the spill reached land-based animals.

Marcus Woo, Contributor

A new study suggests the ecosystem -- and others like it -- can't be relied upon to remove excess carbon from the atmosphere.

Emily DeMarco, Staff Writer

What we hear can help to measure health of an ecosystem.

Mary Caperton Morton, Contributor

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