"A classic illustration of La Brea Tar Pits. ""Smilodon and Canis dirus"" by Robert Bruce Horsfall - http://archive.org/stream/historyoflandmam00scot#page/n9/mode/2up. Licensed under Public Domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Smilodon_and_Canis_dirus.jpg#/media/File:Smilodon_and_Canis_dirus.jpg"
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