National Geographic IDs

Background
TBA.

(January 1, 1994-August 1, 1998)
TBA.

1st Logo (August 1, 1998-late 1990s?)
Note: The video starts at 0:00.

TBA.

2nd Logo (late 1990s?-2005?)
Note: The first video starts at 0:01.

TBA.

3rd Logo (200?)
Note: The video starts at 2:28.

TBA.