By Liz Kimbrough Narwhals are chaotic. At least, that’s what researchers thought until they developed a new math-based method to detect patterns in their seemingly irregular movements. Narwhals (Monodon monoceros) are known as the unicorns of the sea due to their distinctive single tusk, which is actually a feeling, enlarged tooth with up to 10 million nerve endings. These small whales live in Arctic seas and like to take long deep dives, plunging to depths of more than 1,800 meters (5,900 feet) below sea level. Scientists have long been stumped by the whales’ behavior, but now researchers hav…