Zookeepers at Washington D.C.'s National Zoo are abuzz with excitement as they wait to see if Mei Xiang the panda is pregnant. She's experiencing a rise in urinary progesterone, which scientists say, could mean she's pregnant. They've also seen her building a nest. Ultrasound images are inconclusive - Panda fetuses don't develop until the final weeks of gestation. Visitors are thrilled with the news.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!