Explorer — Season 6

Oct 27, 2009

Nov 3, 2009

Nov 10, 2009

Nov 17, 2009

Nov 24, 2009

Apr 19, 2010

Apr 20, 2010

Apr 27, 2010

An extremely rare genetic disease passed down through generations, fatal familial insomnia's (FFI) primary symptom is sleeplessness, but with a fatal twist: victims are dead within months. National Geographic delves into the science of sleep to find out why we need sleep and what happens to us when we don't get it. Witness the pioneering research inside the sleeping brain as well as the mind forbidden to rest for days at a time.

Jun 8, 2010

Jun 15, 2010

Aug 10, 2010

Aug 17, 2010

Aug 24, 2010

Aug 31, 2010

Sep 28, 2010

Nov 16, 2010

Nov 23, 2010

Dec 14, 2010

Jan 17, 2011

Jan 24, 2011

Feb 7, 2011

Feb 14, 2011

Mar 18, 2012

Leonardo da Vinci's "The Battle of Anghiari" vanished 500 years ago, with only copies rendered by other artists left behind to confirm its existence. Scientist and art enthusiast Maurizio Seracini, has dedicated 36 years to tracking down the missing mural, and seems to be on the verge of uncovering the hidden fresco behind the walls of the Palazzo Vecchio in Florence, Italy.

Feb 12, 2012

Mar 5, 2016

National Geographic writer Neil Shea travels to the heart of Kurdistan on a quest to meet the Kurdish fighters on the front lines against the world's biggest terrorist threat, ISIS.