How Sex Changed the World

History's mysteries unfold in a look at secret facets of U.S. institutions and structures. Through in-depth research and exclusive channels, this series delves into a variety of familiar but enigmatic American institutions, from the FBI and the Pentagon to Fort Knox and Area 51. Go beyond the locked doors and security checkpoints of government agencies, famous landmarks and stealthy societies to glimpse the hidden worlds you were never intended to see.

Exploring the apocalyptic theories surrounding Dec. 21, 2012.

Exploring the American food industry.

Spotlighting revolutionary inventions and technology.

Series looking between the fine lines of fact and fiction surrounding some of the darkest characters from our past.

Profiles of masters in their fields.