Megalodon size scale Intermediate 09/17/2013 Dragon blood tree Intermediate 09/09/2013 North Sulawesi babirusa Beginner 06/13/2013 Leucochloridium paradoxum Intermediate 04/03/2013 Human newborn x-Ray Beginner 12/03/2012 Human Lungs - Labeled Intermediate 12/03/2012 Human Lungs - Unlabeled Beginner 12/03/2012 Human Circulatory System (Left Lateral)-Unlabeled Intermediate 12/03/2012 Human Circulatory System (Anterior) - Unlabeled Intermediate 12/03/2012 Human Circulatory System (Anterior) - Labeled Intermediate 12/03/2012