A baby blue whale is born already weighing up to 3 tons and measuring 8 meters (25 feet) in length. In its first year of life, the baby whales feed on nothing but its mother's milk (instead of krill), gaining about 91 kilograms (200 pounds) each day.
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Key Facts In This Video
Blue whales are the largest creatures to have ever lived on Earth. 00:22
Blue whales can hear each other from up to 1,000 miles away. 01:42
The average life span of a blue whale is anywhere from about 80 to 90 years. 03:09