How Big Is a Blue Whale’s Heart? - We created this animation to bring the incredible heart of the blue whale to life — the largest on Earth. From arteries nearly the size of a human head to a heartbeat that echoes for miles underwater, see the amazing size and strength of this ocean giant in action. | The Brain Maze

Blue whale vocalizations are very low frequency sounds with some in the 15 Hz range. These tones characteristically travel long distances due to the high power, but also due to very long-wavelengths (over 300 feet for 15 Hz). This enables their songs to be heard thousands of miles from the source. We can assume that the projection distance is important (Nature can be extravagant, but she is never wasteful), but we can only speculate why they need to broadcast their songs across ocean basins. The