Prehistoric animals
Mammoth vs mastadon
By Mauricio Antón from C. Sedwick (1 April 2008) "What Killed the Woolly Mammoth?". PLoS Biology 6 (4): e99. DOI:10.1371/journal.pbio.0060099.
Licensed under CC BY 2.5 via Wikimedia Commons
Licensed under CC BY 2.5 via Wikimedia Commons