Early human ancestors used their hands like modern humans

Doubt cast on global firestorm generated by dino-killing asteroid

Going with the flow

Two lakes beneath the ice in Greenland, gone within weeks

Death of a dynamo: A hard drive from space

Sequestration on shaky ground

UNL drillers help make new Antarctic discoveries

Ash Spews From Mexico Volcano

Paleontologist names a carnivorous reptile that preceded dinosaurs

Scientists drilling first deep ice core at the South Pole

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