National Zoo: Panda Mei Xiang Gives Birth to TwinsIt's double trouble for the National Zoo after its adult female panda gave birth to twins.
Panda Baby Watch -- Who's the Daddy?Ever since scientists detected a rise in giant panda Mei Xiang's urinary estrogens on March 26, the National Zoo has been abuzz with talk of another baby for the 14-year-old bear.
National Zoo To Live-Tweet Panda Pregnancy WatchWell she's not pregnant yet, but she's National Zoo officials are hopeful Mei Xiang will give birth to a cub this year. And they'll be taking you behind the bars to witness the entire process...on Twitter.

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