Posted: Tue Mar 25, 2014 2:34 pm
Fascinating article..
http://www.independent.co.uk/news/science/scientists-solve-the-mystery-of-the-narwhals-tusk-9202935.html
http://www.independent.co.uk/news/science/scientists-solve-the-mystery-of-the-narwhals-tusk-9202935.html