BILLINGS, Mont. -- Government agencies killed more than 6,000 wild bison leaving Yellowstone National Park over the last two decades -- the grisly result of efforts to contain a serious livestock disease carried by the animals. But the crosshairs are shifting to a new target, elk, as the disease infects cattle in parts of Wyoming and Montana where bison haven't roamed for decades.

Xinhua News Agency reports that Guo Guo was the first panda to give birth since the 7.9-magnitude quake that rocked Sichuan province on May 12, killing nearly 70,000 people and leaving 5 million homeless. One cub weighed 170 grams. Xinhua says Guo Guo was cuddling the other cub and staffers at the Bifengxia Giant Panda Base were not able to weigh it. The report did not give the sex of the twins.