Children listen to a guide while looking at a plastinated human lung at the "Body Worlds" exhibition by Gunther von Hagen in Tegucigalpa November 8, 2012. German anatomist Von Hagen invented plastination, the method for preserving biological tissue specimens. The exhibition displays whole bodies plastinated in lifelike poses and dissected to show various structures and system of the human anatomy. Picture taken November 8, 2012 REUTERS/Jorge Cabrera (HONDURAS - Tags: SOCIETY SCIENCE TECHNOLOGY)