Hi friends,
The African elephant has the longest pregnancy of any mammal. She carries her baby for an average of 660 days. When baby is born it weighs 90-120 kg (195-265 lb). A baby blue whale is even bigger. It weighs 2,000 kg (4,409 lb) and is 7m (23ft) long. It puts on weight at astonishing rate of 90 kg (198 lb) a day. Thank you.
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