The heart of a blue whale. It weighs 400lbs (181kg). It is 4ft | Planet Earth
The heart of a blue whale. It weighs 400lbs (181kg). It is 4ft (1.2m) wide and 5ft (1.5m) tall. Their aorta is 9 inches wide and you can hear their heartbeat from over 2 miles (3.2km) away
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