When 22-year-old giant panda Mei Xiang gave birth to a healthy cub on August 21, 2020, Smithsonian's National Zoo officials were both excited and anxious. That's because giant panda cubs, which weigh about 100 grams — the equivalent of a stick of butter — when born, are challenging to keep alive. Unable to see, hear, or crawl, the helpless infants are completely reliant on their mothers for food and protection. As it turns out, they had little to worry about. The newborn, who celebrated his eight-week birthday on October 16, 2020, is thriving under Mei Xiang's care and showing signs of becoming a feisty toddler.