Blue whales are falling silent, and scientists say it’s not by choice. What could drive the largest animals on Earth to stop singing? How is climate change and warming oceans reshaping their lives? According to research from the Monterey Bay Aquarium Research Institute and NOAA, the silence is a warning of deeper changes in the sea. The question is—how much time do we have to listen? | 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