In case you didn't know, not only are narwhals real, they're rad. Hank shares some little known facts about one of the least understood sea mammals, including some insights into why they're so hard to study, and what that big thing on its face is for!
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Thanks Tank Tumblr: http://thankstank.tumblr.com
http://www.nytimes.com/2005/12/13/science/13narw.html?pagewanted=all&_r=0 ** tusk is sensitive
Tagged under: biology,marine biology,narwhals,whales,cetaceans,mammals,tusks,horns,teeth,science,Hank Green,SciShow
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