BERLIN (AP) — Germany's newest panda twin s are thriving at the Berlin Zoo. The cubs spent their first five days of life taking turns cuddling and drinking milk from their mother every hour.

They were born Thursday to mother , 11. The zoo said Tuesday that it's cautiously optimistic during this critical period — panda cub mortality is at its highest within the first two weeks of birth and through the first month because they don't yet have a functioning immune system.

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