Size Comparison: Human, Elephant, Blue Whale - When we compare a human to the largest animals on Earth, the differences are staggering. An average adult human stands around 1.7 meters tall and weighs about 70 kilograms, with a heart roughly the size of a fist, pumping about 5 liters of blood through the body. Now place that next to the African elephant, the biggest land animal, reaching up to 4 meters in height and weighing as much as 6,000 kilograms. Its heart alone can weigh 20 kilograms and p

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