- ^ Keys, David. "The biggest wonder about the Hanging Gardens of Babylon? They weren't in Babylon". The Independent. Retrieved 12 March 2015.
- ^ "California condor". Wikipedia the free encyclopedia. Retrieved 12 March 2015.
{{cite web}}:|first1=missing|last1=(help) - ^ "Asiatic lion". Wikipedia the free encyclopedia. Retrieved 12 March 2015.
{{cite web}}:|first1=missing|last1=(help) - ^ "Hanging Gardens of Babylon". Wikipedia the free encyclopedia. Retrieved 12 March 2015.
{{cite web}}:|first1=missing|last1=(help) - ^ Alberge, Dalya. "Babylon's hanging garden: ancient scripts give clue to missing wonder". The Guardian. Retrieved 12 March 2015.
