Interesting and Unbelievable Facts

Narwhal, also called narwhale, is a toothed whale with a unique long protruding tusk.  They live in the Arctic waters of Canada,  Russia , Greenland, and  Norway . The scientific name of the narwhal is “ Monodon monoceros ”. It means “one tooth, one horn.” The length of narwhals is between 13 and 20 feet. They can weigh up to 1.5 tons.  Narwhal tusks can grow up to  10 feet long . Scientists have collected data from narwhals to study the effects of global warming  on the Arctic. For this purpose, they attached sensors to the cartilage and blubber of 14 narwhals between 2005 and 2007. It was helpful to retrieve data on the ocean ’s temperature and salinity up to the depth of 1,800 m (6,000 ft.). ( Source ) Animals usually flee or freeze while facing humans, and their heart rate changes accordingly. But the  heart rate of narwhals has the opposite effect while escaping from humans as it goes extremely low. It shows that human interaction can cause deaths of a large number of narwhals