Understanding - 1994 Beauty was released on:
USA: 1995
Understanding - 1994 Oceans was released on: USA: 1997
Understanding - 1994 Skyscrapers was released on: USA: 1999
Understanding - 1994 Cars was released on: USA: 1997
Understanding - 1994 Electricity was released on: USA: 1997
Understanding - 1994 Evolution was released on: USA: 1 April 2002
Understanding - 1994 Extraterrestrials was released on: USA: 29 August 1998
Understanding - 1994 Computing was released on: USA: 12 March 1996
Understanding - 1994 Fire was released on: USA: 12 December 2000
Understanding - 1994 Cities was released on: USA: 19 February 1996
Understanding - 1994 Asteroids and Comets was released on: USA: 2001
Understanding - 1994 Cyberworld 2020 was released on: USA: 20 February 2002
Understanding - 1994 Air Traffic Control was released on: USA: January 2001