These polar bear twins have every reason to look happy: they celebrated their first 100 days of life on Wednesday at China's Tianjin Polar Ocean Park.
When the two female cubs were born in March, they were so small that they had to be placed in incubators and given round-the-clock care. Luckily, the twins, the first polar bears born at the park, have cleared their hurdles and look ready to tumble through life with enthusiasm.
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