TIL Sperm whales only have one blow hole which evolved from the left nostril. The right nostril is located inside the front of the whale's head and has evolved into a pair of lips used for echolocation.

http://en.wikipedia.org/wiki/Sperm_whale#Mechanism



Submitted April 11, 2015 at 10:08PM by xenomorphs_sombrero http://www.reddit.com/r/todayilearned/comments/328s1e/til_sperm_whales_only_have_one_blow_hole_which/