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Twins! Toronto Zoo Welcomes 2 Baby Pandas

Twin Pandas - Toronto Zoo
Twin panda cubs were born on Oct. 13, 2015, at the Toronto Zoo in Canada. (Image credit: Toronto Zoo)

Two giant-panda cubs were born today (Oct. 13) at the Toronto Zoo, becoming the first pandas ever born on Canadian soil.

The zoo's female giant panda, Er Shun, gave birth to the first cub early this morning, at 3:31 a.m. EDT. A second cub followed at 3:44 a.m. EDT, according to zoo staff. The first cub weighed 6.6 ounces (187.7 grams), and its slightly younger twin weighed 4 ounces (115 g).

John Tracogna, CEO of the Toronto Zoo, called the births "historical," and praised the organization's successful reproduction program. [Photos: World's Cutest Baby Wild Animals]

"We are so proud to be contributing to the ongoing survival of this endangered species," Tracogna said in a statement.

The twin cubs have bulbous heads, and their tiny, pink bodies are covered in fuzzy, white hair. Giant pandas are typically born blind, and zoo representatives say it could be months before they are able to determine the sex and paternity of the cubs.

Shortly after the first cub was born, Er Shun's maternal instincts kicked in, and she began cradling and cleaning the tiny fur ball. Both cubs have been bonding with their mother, according to zoo staff, but they'll remain in the maternity area, away from public view, for the next several months.

The Toronto Zoo is working with panda experts from the Chengdu Research Base of Giant Panda Breeding in China. Er Shun and her male companion, Da Mao, are currently on loan to the Toronto Zoo from China, as part of a long-term conservation and breeding program. The giant pandas will remain in Toronto until 2018, and then will relocate to the Calgary Zoo in Alberta.

"We look forward to sharing our learnings with scientists around the world in the hope this will help us save this endangered species," Councillor Raymond Cho, chairman of the Toronto Zoo Board of Management, said in a statement.

Follow Denise Chow on Twitter @denisechow. Follow Live Science @livescience, Facebook & Google+. Original article on Live Science.

Denise Chow
Denise Chow

Denise Chow was the assistant managing editor at Live Science before moving to NBC News as a science reporter, where she focuses on general science and climate change. Before joining the Live Science team in 2013, she spent two years as a staff writer for, writing about rocket launches and covering NASA's final three space shuttle missions. A Canadian transplant, Denise has a bachelor's degree from the University of Toronto, and a master's degree in journalism from New York University.