Baby Panda Twins Born in Madrid Zoo

Newly-born panda bears sleep in their incubator at the Madrid Zoo on October 7, 2010 in Madrid, Spain. The giant panda cubs, born today a month ago, on September 7, 2010, are the first giant panda twins to be conceived using the artificial insemination method outside of China. The gender of the cubs is still unknown.

MADRID, SPAIN - OCTOBER 07: Newly born panda bears sleep in their incubator at the Madrid Zoo on October 7, 2010 in Madrid, Spain. The giant panda cubs, born today a month ago, on September 7, 2010, are the first giant panda twins to be conceived using the artificial insemination method outside of China. The gender of the cubs is still unkown. (Photo by Jasper Juinen/Getty Images)

MADRID, SPAIN - OCTOBER 07: A newly born panda bear sleeps in it's incubator at the Madrid Zoo on October 7, 2010 in Madrid, Spain. The giant panda cubs, born today a month ago, on September 7, 2010, are the first giant panda twins to be conceived using the artificial insemination method outside of China. The gender of the cubs is still unkown. (Photo by Jasper Juinen/Getty Images)

MADRID, SPAIN - OCTOBER 07: Newly born panda bears sleep in their incubator at the Madrid Zoo on October 7, 2010 in Madrid, Spain. The giant panda cubs, born today a month ago, on September 7, 2010, are the first giant panda twins to be conceived using the artificial insemination method outside of China. The gender of the cubs is still unkown. (Photo by Jasper Juinen/Getty Images)