Narwhals become quieter as the Arctic Ocean grows louder
via arstechnica.com
Short excerpt below. Read at the original source.
For most of their evolutionary history, narwhals have relied more on sound than sight to survive in the Arctic’s dark icy waters. The speckled toothed whales—sometimes referred to as “unicorns of the sea” for the long, spiral tusks that protrude from the heads of males—navigate, hunt, and communicate using echolocation. By emitting a series of […]